TY  - BOOK
AU  - Calvin,Allen D.
TI  - Programmed instruction: bold new venture,
AV  - LB1028.5 .C28
U1  - 371.39/44 
PY  - 1969///]
CY  - Bloomington
PB  - Indiana University Press
KW  - Programmed instruction
N1  - Bibliographical references included in "Notes and references" (p. 241-246)
ER  -