1-5 of 5 Books

Représentation du monde chez l'enfant
By Jean Piaget

Set theory and hierarchy theory 5, Bierutowice, Poland 1976
By Conference on Set Theory and Hierarchy Theory (3rd 1977 Bierutowice)

Logische Grundlagen der Mathematik
By Ralf-Dieter Schindler

Mengenlehre Fr Den Mathematiker
By Ulf Friedrichsdorf