TY  - BOOK
AU  - Lewin, Kurt
AU  - Fritz Heider ; Grace M. Heider
TI  - Principles of topological psychology
U1  - 150.1 
PY  - 1936///
CY  - MCGRAW-HILL
PB  - New York
KW  - Psychology
N1  - Includes Bibliography,Index,Glossary
ER  -