The Art of Problem Posing

Author:
Steve Phelps
"What if each attribute were not so; what could it be then?"
[i]Brown & Walter, 2005 [url=https://www.amazon.com/Art-Problem-Posing-Stephen-Brown/dp/0805849777]https://www.amazon.com/Art-Problem-Posing-Stephen-Brown/dp/0805849777[/url] [/i]
Brown & Walter, 2005 https://www.amazon.com/Art-Problem-Posing-Stephen-Brown/dp/0805849777

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