Gilmore, Alden S. Mental retardation a programmed manual for volunteer workers by Alden S. Gilmore and Thomas A. Rich : with a foreword by Mary E. Switzer. - Springfield, Ill. Thomas [1967] - xi, 138 p. illus. Bibliography: p. 134-138. LCCN: 67016107 Subjects--Topical Terms: Mentally handicapped--Programmed instruction.Mental Retardation--Programmed instruction. LC Class. No.: HV3004 / .G52 1967 Dewey Class. No.: 371.92/077