TY  - BOOK
AU  - Lieberman,Josefa Nina
TI  - Playfulness: its relationship to imagination and creativity 
SN  - 0124494501
PY  - 1977///
CY  - New York
PB  - Academic Press
KW  - Play
KW  - Psychological aspects
KW  - Imagination
KW  - Creative ability
N1  - Includes index; Bibliography: p. 163-175
ER  -