TY  - BOOK
AU  - Lewin,Kurt
AU  - Heider,Fritz
AU  - Heider,Grace M.
TI  - Principles of topological psychology
U1  - 150 
PY  - 1936///
CY  - New York
PB  - McGraw-Hill
KW  - Gestalt psychology
N1  - Includes bibliographical references and index
ER  -