Books by Sigma XI
The Semi-centennial Celebration of the Sigma Chi Fraternity
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The Semi-centennial Celebration of the Sigma Chi Fraternity
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American Scientist, Volumes 9-12
Society of the Sigma XI, Of The Sigma XI
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American Scientist, Volumes 1-4
Of The Sigma XI Society of the Sigma XI
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Quarter century record and history, 1886-1911;
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Proceedings Of The ... Convention Of The Society Of The Sigma Xi, Volume 13...
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