TY  - BOOK
AU  - Coppen,Helen Elizabeth
TI  - Aids to teaching and learning / 
T2  - The Commonwealth and International Library. Education and Educational Research Division
SN  - 0080129048
AV  - LB1043 .C656 1969
U1  - 371.3 
PY  - 1969///
CY  - Oxford
PB  - PERGAMON, 
KW  - Teaching
KW  - Aids and devices
N1  - Bibliography: p. 225-230
ER  -