Mattock, G. (1961). pH measurement and titration. Heywood.
Lua i Stíl Chicago (17ú heag.)Mattock, George. PH Measurement and Titration. Lond.: Heywood, 1961.
Lua MLA (8ú heag.)Mattock, George. PH Measurement and Titration. Heywood, 1961.
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