TY  - BOOK
AU  - WICKELGREN, Wayne. A
TI  - How to solve problems: elements of a theory of problems and problem solving
SN  - 0716708469
PY  - 1974///
CY  - San Francisco
PB  - W.H Freeman and Company
KW  - Mathematics
KW  - Problems,exercises
KW  - Problem solving
N1  - Includes bibliographical references and index
ER  -