"Gay Block"@en . "Gay Block and Malka Drucker produced the interview with Libuse and Erna Fries on July 23,1988 for their book\"Rescuers: Portraits of Moral Courage in the Holocaust\" Holmes & Meier, 1992, as well as their documentary film\"They Risked Their Lives: Rescuers of the Holocaust\" The United States Holocaust Memorial Museum Oral History Branch received the tapes of the interviews from Malka Drucker and Gay Block in March 1989."@en . . "Oral history interview with Libuse Fries and Erna Fries"@en . . "1 videocassette (VHS), sound, color ; 1/2 in."@en . . "No restrictions on use"@en . . . . . . . "1988 July 23" . . "No restrictions on access"@en . "irn506509" .