LCCN 39-18432: His A Cremona transformation generated by a pencil of surfaces, 1938 (hdg.: Ayres, Frank, 1901- ; usage: Frank Ayres, jr.)

LC data base, 10-9-86 (hdg.: Ayres, Frank, 1901- )

U.S. copyright file, Apr. 4, 2008 (Ayres, Frank, Jr., 1901-1994)

SSDI, Apr. 4, 2008 (Ayres, Frank; b. Dec. 10, 1901; d. Aug. 5, 1994, Carlisle, Pa.)