@BOOK{ Book!D - 100927354,
AUTHOR = "/ by Wayne A. Wickelgren",
TITLE = "How to solve problems; elements of a theory of problems and problem solving",
LIBRARY= "کتابخانه دانشکده منابع طبیعی (دانشگاه تهران)",
SUBJECT = "Mathematics - problems, exercises, etc ...,Problem solving",
URL = "/book/100927354/How-to-solve-problems-elements-of-a-theory-of-pro/"}