The Aaron Copland Oral History comprises approximately 75 interviews with colleagues, friends, and family of Aaron Copland (note: for interviews with Copland himself, see the Major Figures in American Music collection). OHAM founder Vivian Perlis first became friends with Copland while working on the Charles Ives Oral History. Copland later wrote the preface for her book, Charles Ives Remembered. As the Ives project finished, Perlis focused on Copland as her new subject. From 1975 to 1976, she conducted many hours of interviews with Copland and those closest to him. Finally, in 1984 and 1989, their efforts culminated in the autobiographies, Copland: 1900 through 1942 and Copland: Since 1943, co-authored by Perlis.