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1
Explorations : an introduction to astronomy / Thomas Arny.
Boston : McGraw-Hill, 2006
594 p. ; 27 cm.
2
Explorations : an introduction to astronomy / Thomas T. Arny.
Boston, Mass. : McGraw-Hill/WCB, c1998.
xxii, 580 p. : ill. (some col.) ; 28 cm.