TY  - BOOK
AU  - Ellis,Willis Davis
AU  - Koffka,K.
TI  - A source book of Gestalt psychology
U1  - 150.198208 
PY  - 1938/// [Impression 1955]
CY  - New York ; London
PB  - Humanities Press; Routledge & Kegan Paul Ltd.
KW  - Gestalt psychology
ER  -