TY  - BOOK
AU  - Heyting A ed.
ED  - Colloquium on constructivity in mathematics( 1957 : Amsterdam )
ED  - Colloquium on constructivity in mathematics
TI  - Constructivity in mathematics: proceedings
U1  - 511.3 
PY  - 1959///
CY  - Amsterdam
PB  - North-Holland
KW  - Constructive mathematics
KW  - Mathematical logic
ER  -