TY  - BOOK
AU  - Hackler,David
TI  - How charts and drawings help us
T2  - Supplementary social studies program. Basic concepts series
AV  - LB1027 .H2
U1  - 001 
PY  - 1965///
CY  - Chicago
PB  - Benefic Press
KW  - Education
KW  - Graphic methods
ER  -