Não informado. (1968). Gas Chromatography Literature: Abstracts and Index. Preston Publications.
Lua i Stíl Chicago (17ú heag.)Não informado. Gas Chromatography Literature: Abstracts and Index. Niles, Ill: Preston Publications, 1968.
Lua MLA (8ú heag.)Não informado. Gas Chromatography Literature: Abstracts and Index. Preston Publications, 1968.
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