TY  - BOOK
AU  - Nickson,Marilyn
ED  - Ward Lock Educational
TI  - Educational technology: a systematic approach for teachers 
SN  - 0706233107
U1  - 371.33 23
PY  - 1971///.
CY  - London: 
PB  - Ward Lock Educational, 
KW  - Teaching
KW  - Aids and devices
N1  - Includes bibliography p. 89-91 and index
ER  -