TY  - BOOK
AU  - Piaget Jean
TI  - Main trends in inter-disciplinary research
U1  - R2xM96, L3 
PY  - 1973///
CY  - London
PB  - Allen and Unwin U. K.      
KW  -  Philosophy
KW  - Epistemology-Piaget
N1  - Main trends in the social sciences.5.; #Forming Chapter 7 of Unesco:Main trends of research in the social and human sciences. Part 1
ER  -