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On the hydrogen-ion concentration of hay infusions, with special reference to its influence on the protozoan sequence.
Author: Singh-Pruthi, Hem
Call no: RP4618
Year: 1927
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The relation of Spirostomum ambiguum to the hydrogen ion concentration(alkaline range).
Author: Jenkin, Penelope M.
Call no: RP6250
Year: 1927
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Freshwater Copepoda and hydrogen ion concentration
Author: Lowndes, A. G.
Call no: RP7158
Year: 1923
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Guidelines for pH measurement in conservation / by Simon Tse
Author: Tse, Season; Canadian Conservation Institute
Year: 2007
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