Comparative research on methods and media for presenting programed  courses in mathematics and English
By: a cooperative project by the University Division of Instructional Services and the Departments of Mathematics and English at the Pennsylvania State University under the direction of C. R. Carpenter and L. P. Greenhill.
Publisher: Pennsylvania State University
Published: 1963
Place of publication: University Park
Language: eng
Number of pages: 74
Subjects: Programmed instruction.