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Reactions and derivatives of dichloro-ethyl sulfide ...Helfrich, Oregon Benson, January 1920 (has links)
Thesis (Ph. D.)--Johns Hopkins University, 1920. / Biography.
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Reactions and derivatives of dichloro-ethyl sulfide ...Helfrich, Oregon Benson, January 1920 (has links)
Thesis (PH. D.)--Johns Hopkins University, 1920. / Biography.
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