TY  - BOOK
AU  - Exton, William
AU  - Exton, William
TI  - Audiovisual aids to instruction
U1  - 371.33 
PY  - 1947///
CY  - New York
PB  - Mcgraw-Hill Book Company
KW  - MCE
N1  - 0; 0; 0; 371_330000000000000_EXT
ER  -