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2
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The sky : a userʼs guide / David H. Levy.
- 520 L6681
- Levy, David H., 1948-
- Cambridge University Press,
- Cambridge :
-
Observing variable stars : a guide for the beginner / David H. Levy.
- 523.844 L6681 1998
- Levy, David H., 1948-
- Cambridge University Press, University Press,
- Cambridge : Cambridge :