TY  - BOOK
AU  - Ellington,Henry
TI  - Producing teaching materials : : a handbook for teachers and trainers / 
SN  - 0850389402 
U1  - 371.33 23
PY  - 1987///.
CY  - London : 
PB  - Kogan Page, 
KW  - Educational resources and technology.
ER  -