Programs, '63 : a guide to programed instructional materials available to educators by September 1963 ...
· edited by Lincoln F. Hanson ; with the assistance of Carol Christman and Gertruce Seidel ; compiled and produced by Research Division, the Center for Programmed Instruction ; inc. in cooperation with the U.S. Department of Health, Education and Welfare, Office of Education
Bok Engelsk 1963