WOODRUFF, S. L.
Introduction to astronomy, by S. L. Woodruff & Delwyn Hyatt. Under the direction of K. J. Christoph. NM: revisions & additions.
WOODRUFF, S. L. Introduction to astronomy, by S. L. Woodruff & Delwyn Hyatt. Under the direction of K. J. Christoph. NM: revisions & additions. © 8Aug41; AA377553. United States Naval Institute (PWH); 28Feb69; R456668.
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