Endeavor Public Library
520
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http://bibfra.me/vocab/lite/Category
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520
Code
520
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The Cambridge encyclopaedia of astronomy, editor-in-chief, Simon Mitton ; foreword by Sir Martin Ryle
Space, contributors, Sue Becklake, John Farndon, Tim Furniss, Clint Twist
Night sky, written by Carole Stott
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