TY  - BOOK
AU  - Beth,Evert Willem
AU  - Piaget,Jean
AU  - Mays,W.
TI  - Mathematical epistemology and psychology
PY  - 1966///
CY  - Dordrecht
PB  - D. Reidel Publishing Company
N1  - Бібліогр. : c. 313-317, Index
ER  -