TY  - BOOK
AU  - van den Berg, J. H.
AU  - Croes, H. F. 
TI  - The Changing Nature of Man : : Introduction to a Historical Psychology 
AV  - BF708.D8  .B43 1975
PY  - 1975///
CY  - New York, NY : 
PB  - Dell Pub. Co., 
KW  - Genetic psychology.Change (Psychology)
N1  - Translation of : Metabletica, of Leer der Veranderingen.
ER  -