En su extensa trayectoria, DOUGLASS ha escrito más de 20 libros y una centena de artículos: "Death in Murelaga"; "Amerikanuak, Basques in the New World" (junto a Jon Bilbao); "Echalar and Murelaga: Opportunity and rural depopulation in two Spanish Basque Villages"; "BELTRAN: Basque sheepman of the American West"; "terror and Taboo.
Ibilbide oparoan, 20 liburu baino gehiago eta 100 artikulutik gora idatzi ditu: "Death in Murelaga"; "Amerikanuak, Basques in the New World" (Jon Bilbaorekin batera); "Echalar and Murelaga: Opportunity and rural depopulation in two Spanish Basque Villages"; "Beltran: Basque sheepman of the American West"; "Terror and Taboo.