There were many books, articles, papers, and documentaries used in writing A Duel of Bulls: Hemingway and Welles in Love and War. Below is an extensive, exhaustive list of all the resources that were used as background for it.

Books

• Ernest Hemingway, Carlos Baker

• Ernest Hemingway: Selected Letters (1917-1961), Carlos Baker (ed.)

• The Battle for Spain: The Spanish Civil War 1936-1939, Antony Beevor

• This is Orson Welles, Orson Welles and Peter Bogdanovich

• Orson Welles: Hello Americans, Simon Callow

• Orson Welles: One-Man Band, Simon Callow

• Orson Welles: The Road to Xanadu, Simon Callow

• Slightly Out of Focus, Robert Capa

• Ernest Hemingway, Mary Dearborn

• The Face of War, Martha Gellhorn

• The View from the Ground, Martha Gellhorn

• A Thousand Afternoons, Peter Haining (ed.)

• A Moveable Feast, Ernest Hemingway

• By-Line Hemingway, Ernest Hemingway

• Death in the Afternoon, Ernest Hemingway

• For Whom the Bell Tolls, Ernest Hemingway

• The Fifth Column, Ernest Hemingway

• The Old Man and the Sea, Ernest Hemingway

• Running with the Bulls, Valerie Hemingway

• Papa Hemingway, AE Hotchner

• On Hemingway and Spain, Allen Josephs

• Martha Gellhorn: A Life, Caroline Moorehead

• Hemingway and the Spanish Civil War: The Distant Sound of Battle, Gilbert H. Muller

• Homage to Catalonia, George Orwell

• Hemingway: The Paris Years, Michael Reynolds

• Hemingway: The 1930s, Michael Reynolds

• Hemingway: The Homecoming, Michael Reynolds

• Hemingway: The Final Years, Michael Reynolds

• The Young Hemingway, Michael Reynolds

• Autumn in Venice, Andrea di Robilant

• Sparring with Hemingway, Budd Schulberg

• Dangerous Friends, Peter Viertel

• Hotel Florida: Truth, Love, and Death in the Spanish Civil War, Amanda Vaill

• In My Father’s Shadow, Christopher Welles

• The Spanish Civil War: A Very Short Introduction

• Ernest Hemingway: The Last Interview and Other Conversations

Papers and Articles

• ‘Lost script reveals what Orson Welles really thought about Ernest Hemingway’, Dalya Alberge, The Guardian

• ‘Three Dangerous Summers: Orson Welles’s Unrealised Hemingway Trilogy’, Matthew Asprey Gear, The Hemingway Review

• ‘Memorial Day Massacre of 1937’, Elizabeth Barahona, Chicago History

• ‘The True Story of the Booze, Bullfights, and Brawls that inspired Ernest Hemingway’s The Sun Also Rises’, Lesley MM Blume, Vanity Fair

• Martha Gellhorn’s ‘Zoo in Madrid‘: Hope and Betrayal in the Spanish Civil War, Mauricio D. Aguilera-Linde

• ‘Why Running with the Bulls is More than a Deathwish’, Tony Diver, The Telegraph

• ‘Clash of the Titans: When Orson Welles met Ernest Hemingway to narrate The Spanish Earth (May, 1937)’, Lawrence French, Wellesnet

• ‘Orson Welles in Madrid, June 1966, Talking about The Sacred Beasts’, Lawrence French, Wellesnet

• ‘Orson Welles on Bullfighting as an Art’, Alexander Fiske-Harrison, The Last Arena

• ‘”The Earth Endureth Forever”: Hemingway in Spain’, Dale T. Graden, The Volunteer

• ‘Hemingway, Hounded by the Feds’, AE Hotchner, The New York Times

• ‘Orson Welles, Lumbering with the Bulls’, Stephen Hunter, The Washington Post

• ‘Exploring the Hemingway/Welles Connection’, Ray Kelly, Wellesnet

• ‘A Memorial Day Massacre’, Dick Meister, TruthOut

• ‘How Orson Welles’s The Other Side of the Wind Was Rescued from Oblivion’, Alex Ross, The New Yorker

• ‘Hemingway’s Chronic Traumatic Encephalopathy’, Sydney T. Smith, The Psychiatric Times

• ‘A Century On, Hemingway’s Prose Lures Revellers to Spain’s Pamplona’, Susana Vera, Reuters

• ‘Taurus Rising’, Joseph S. Furey, The Daily Telegraph

• ‘Ernest Hemingway: Sixty Years after the Bell Tolled’, The New European

Contemporaneous Articles

• ‘Room and Bath at the Hotel Florida’, John Dos Passos, Esquire (1938)

• ‘Memorial Day Massacre’, Howard Fast, New Masses

• ‘Fascism is a Lie’, Ernest Hemingway, New Masses, (June 1937)

• ‘Who Murdered the Vets?’, Ernest Hemingway, New Masses (September 1935)

• ‘Battle for Paris’, Ernest Hemingway, Collier’s (September 1944)

• ‘How We Came to Paris’, Ernest Hemingway, Collier’s (October 1944)

• ‘London Fights the Robots’, Ernest Hemingway, Collier’s (August 1944)

• ‘The GI and the General’, Ernest Hemingway, Collier’s (November 1944)

• ‘The Sling and the Pebble’, Ernest Hemingway, Free World (March 1946)

• ‘Voyage to Victory’, Ernest Hemingway, Collier’s (July 1944)

• ‘War in the Siegfried Line’, Ernest Hemingway, Collier’s (November 1944)

Documentaries

• Hemingway

• In the Land of Don Quixote

• The Spanish Civil War

• The Spanish Civil War

• Death in the Arena

• How Did Orson Welles Make Citizen Kane

• American – An Odyssey to 1947

• Arena: The Orson Welles Story

• Around the World with Orson Welles – Madrid Bullfight

• Ernest Hemingway and World War I

• Filming Othello

• Hemingway House – Virtual Tour

• Hemingway Unknown

• In the Shadow of Kane

• Magician: The Astonishing Life and Work of Orson Welles

• Orson Welles Over Europe

• Orson Welles Sketchbook

• Orson Welles – The ‘Alien Invasion’ That Fooled America

• Orson Welles – The One Man Band

• Portrait – Orson Welles

• Red Sands

• Spain – Castles and Fiesta

• Talking Pictures – Orson Welles

• The Mexican Suitcase

• The Outsiders – Martha Gellhorn

• The Skeletons of Spain’s Fascist Past

• The Eyes of Orson Welles

• The Spanish Earth

• This is Orson Welles

• Unhealed Wounds: The Life of Ernest Hemingway

• Want to Know About Gerda Taro, the War Photographer

Films

• Chimes at Midnight

• Confidential Report

• F for Fake

• The Immortal Story

• In Love and War

• Me and Orson Welles

• RKO 281

• Ed Wood