editions of Mathematical Discovery: On Understanding, Learning and Teaching Problem Solving Combined Edition

Mathematical Discovery: On Understanding, Learning and Teaching Problem Solving Combined Edition (Paperback)
by George Pólya
avg rating: 4.50 (9 ratings)
isbn: 0471089753 (isbn13: 9780471089759)
published: 1981 (first published 1965) by Wiley | binding: Paperback | pages: 432

Mathematical Discovery (Hardcover)
by George Pólya
avg rating: 0.0 (0 ratings)
isbn: 0471693359 (isbn13: 9780471693352)
published: 1965 by John Wiley & Sons | binding: Hardcover | pages: 215