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Signs & Seasons Understanding the Elements of Classical Astronomy by Jay Ryan
Signs & Seasons Understanding the Elements of Classical Astronomy
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Jay Ryan

Signs & Seasons Understanding the Elements of Classical Astronomy

Jay Ryan

262 pages • first pub 2007 (editions)

nonfiction science informative medium-paced
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Signs & Seasons Field Journal & Test Manual by Jay Ryan

Signs & Seasons Field Journal & Test Manual

Jay Ryan

192 pages • first pub 2007 (editions)

nonfiction science informative medium-paced