TY  - BOOK
AU  - Harry Helson
TI  - Adaptation-Level Theory : An Experimental and Systematic approach to Behaviour
U1  - 150 
PY  - 1964///
CY  - New York
PB  - Harper & Row Publication
N1  - Harry Helson: Adaptation-Level Theory : An Experimental and Systematic approach to Behaviour.  New York.  Harper & Row Publication, 1964.--(150HEL)
ER  -