Willard, H. H. (1986). Instrumental methods of chemical analysis (7th.). CBS Publisher, New Delhi.
Lua i Stíl Chicago (17ú heag.)Willard, Hobart H. Instrumental Methods of Chemical Analysis. 7th. CBS Publisher, New Delhi, 1986.
Lua MLA (9ú heag.)Willard, Hobart H. Instrumental Methods of Chemical Analysis. 7th. CBS Publisher, New Delhi, 1986.
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