Pocztar, Jerry. The theory and practice of programmed instruction : a guide for teachers / Jerry Pocztar. - Paris : UNESCO, c 1972. - 179 p. : ill. ; 21 cm. - Monographs on education, vii. . 332 332 Subjects--Topical Terms: Programmed instruction. Dewey Class. No.: 371.39422 / P752t