ISBN 9780805802580 books & textbook
The Art of Problem Posing, Second Edition
Brown, Stephen I. Walter, Marion I.
Routledge /1990-01-03 Paperback / 160 Pages
isbn-10: 0805802584 / isbn-13: 9780805802580
Brown, Stephen I. Walter, Marion I.
Routledge /1990-01-03 Paperback / 160 Pages
isbn-10: 0805802584 / isbn-13: 9780805802580