TY - BOOK AU - Luchins, Abraham S. AU - Luchins, Edith Hirsch, ED - ED - ED - ED - SN - 2 PY - 1965///46 CY - New York PB - Holt, Rinehart and Winston KW - KW - 2 KW - 0 KW - 6 KW - 20 KW - Philosophy KW - Mathematics;Logic, Symbolic and mathematical.;Psychology N1 - Bibliography: p. 394-418; 5 ER -