TY  - BOOK
AU  - Weaver,Gilbert Grimes
AU  - Bollinger,Elroy William,1897- jtau
TI  - Visual aids
PY  - 1949///
CY  - New York
PB  - D. Van Nostrand Co.
KW  - Visual education
KW  - Local
N1  - Includes index
ER  -