APA Style
Obst, Wesley J.. ().
The World treasury of physics, astronomy and mathematics .
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Chicago Style
Obst, Wesley J..
The World treasury of physics, astronomy and mathematics.
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MLA Style
Obst, Wesley J..
The World treasury of physics, astronomy and mathematics.
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Turabian Style
Obst, Wesley J..
The World treasury of physics, astronomy and mathematics.
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.
.