This is a new release of the original 1946 edition.

The Great Challenge 2013, Literary Licensing, LLC

ISBN-13: 9781258934422

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The Great Challenge 2013, Literary Licensing, LLC

ISBN-13: 9781494092832

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The Great Challenge 2009, Kessinger Publishing, Whitefish MT

ISBN-13: 9781104836306

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The Great Challenge 2007, Kessinger Publishing, Whitefish MT

ISBN-13: 9780548384848

Trade paperback

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Great Challenge 1971,

ISBN-13: 9780804614061

Hardcover

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