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Moon -- Miscellanea in subject [X]
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Earth -- Miscellanea (1)
Moon -- Miscellanea[X]
Solar system -- Miscellanea (1)
1Title:  The riddle of the earth-moon double planet: An open letter to the astronomers of all countries   
 Creator:  Weisberger, Josef. 
 Publication:  The Author, Wien, [c1935] 
 Extent:  20 p. ; 24 cm. 
 Subjects:  Solar system -- Miscellanea | Earth -- Miscellanea | Moon -- Miscellanea

Collection:  American Philosophical Society 
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