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Genre Oral histories Remove constraint Genre: Oral histories Language English Remove constraint Language: English Creator Thackray, Arnold, 1939- Remove constraint Creator: Thackray, Arnold, 1939- Creator Beckman, Arnold O. Remove constraint Creator: Beckman, Arnold O. Creator Sturchio, Jeffrey L. (Jeffrey Louis), 1952- Remove constraint Creator: Sturchio, Jeffrey L. (Jeffrey Louis), 1952- Subject Hydrogen-ion concentration--Measurement Remove constraint Subject: Hydrogen-ion concentration--Measurement
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