How to solve it :
Pólya, George, 1887-1985.
How to solve it : a new aspect of mathematical method / G. Pólya. - 2nd ed. - Princeton, N.J. : Princeton U.P, 1957. - xxi,253 p : ill. ; 21 cm. - Princeton paperbacks ; no.246 .
0691080976 9780691080970
Mathematics--Study and teaching.
Mathematics--Problems, exercises, etc.
How to solve it : a new aspect of mathematical method / G. Pólya. - 2nd ed. - Princeton, N.J. : Princeton U.P, 1957. - xxi,253 p : ill. ; 21 cm. - Princeton paperbacks ; no.246 .
0691080976 9780691080970
Mathematics--Study and teaching.
Mathematics--Problems, exercises, etc.
