Brain-flexing Balance Problems and Other Puzzles (Ivan Moscovich's Mastermind Collection) (Ivan Moscovich's Mastermind Collection S.)
by Ivan Moscovich
ISBN 13: 9781402727337
Format: Paperback (128 pages) Publisher: Sterling Published: 09 Nov 2006
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Perplexing Pattern Problems & Other Puzzles (Ivan Moscovich's MasterMind Collections)
ISBN 13: 9781402723452
Format: Paperback (128 pages) Publisher: Sterling Publishing (NY) Published: 01 Dec 2005