Beth, Evert Willem.
Mathematical epistemology and psychology /
Evert W. Beth, Jean Piaget ; translated from the French by W. Mays 
. - Dordrecht : D. Reidel Publishing Company,  1966 
. - xxi, 326 p.  24 cm. 
 - (Synthese library : monographs of epistemology, logic, methodology, philosophy of science, sociology of science and knowledge, and on the mathematical methods of social and behavioral sciences )
<br/>К.: Бібліогр. : c. 313-317, Index