Polya, George, 1887-1985.
Mathematical discovery : on understanding, learning, and teaching problem solving / George Polya. - New York : Wiley, 1965. - 2 v. : ill.
Problem solving.
Mathematics--Problems, exercises, etc.
Mathematical discovery : on understanding, learning, and teaching problem solving / George Polya. - New York : Wiley, 1965. - 2 v. : ill.
Problem solving.
Mathematics--Problems, exercises, etc.