TY  - BOOK
AU  - Berg,Jan Hendrik van den
AU  - Croes,H.F.
TI  - The changing nature of man: Introduction to a historical psychology 
U1  - 136 
PY  - 1964///
CY  - New York
PB  - Dell Publ. Co., Inc.
KW  - Genetic psychology
KW  - Change (Psychology)
N1  - Translation of Metabletica; Includes bibliogr. references
ER  -