TY  - BOOK
AU  -  Bale,Kenneth
TI  -  The use of electricity in operations of aurals and visual aids equip ment : :  a short guide / 
U1  -  371.33 
PY  - 1968///
CY  -  London : 
PB  -  Oversea Visual Aids Centre, 
KW  -  Electricity
ER  -