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Nature invents, science applies
Ray Bethers
Hardcover (Hastings house, March 15, 1961)None
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nature invents science applies: a book for today's boys and girls
ray bethers
Hardcover (hardback with dj, March 15, 1959)None
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Nature Invents, Science Applies
Ray Bethers
Hardcover (Hastings House, March 15, 1959)None
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Nature invents,science applies
Ray Bethers
Unknown Binding (Constable, March 15, 1959)None