TY  - BOOK
AU  - Leggat, Robert 
TI  - Lights Please using projectors in the classroom
U1  - 371.33 L513l 
PY  - 1972///
CY  - London
PB  - National committee for audio-visual aids
KW  - Matériel didactique Projectors
KW  - Teaching Aids and devices
KW  - Instructional materials
ER  -