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1.
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by Frank E. Ross and Mary R. Calvert; made from negatives secured at the Mount Wilson and Lowell observatories by Frank E. Ross, with the assistance of Kenneth Newman
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2.
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by William Anthony Granville, Percey F. Smith and William Raymond Longley
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3.
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by Robert W. Wood
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4.
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by Harvey Elliott White
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5.
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by Kyoji Suyehiro ; compiled and pulished by the Suyehiro Memorial Committee
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6.
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by Harvey Elliott White
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7.
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by Kenneth P. Williams
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8.
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compiled by H. Knox-Shaw and H. G. Scott Barrett
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9.
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by Richard C. Tolman
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10.
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compiled by Amelia De Lella
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