TY  - BOOK
AU  - Herbert,John David
TI  - A system for analyzing lessons
T2  - Teachers College studies in education
AV  - LB1025 .H573
U1  - 371.3/0282 
PY  - 1967///]
CY  - New York
PB  - Teachers College Press
KW  - Teaching
KW  - Aids and devices
KW  - Local
N1  - Bibliography: p. 123-126
ER  -