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Preliminary Evidence of Internal Motion in the Spiral Nebula Messier 101
A. Van Maanen
Proceedings of the National Academy of Sciences of the United States of America
Vol. 2, No. 7 (Jul. 15, 1916), pp. 386-390
Published by: National Academy of Sciences
Stable URL: http://www.jstor.org/stable/83588
Page Count: 5