Ashley, R. H. (1918). Chemical calculations (2d ed., rev.). Van Nostrand.
Lua i Stíl Chicago (17ú heag.)Ashley, Raymond Harman. Chemical Calculations. 2d ed., rev. New York: Van Nostrand, 1918.
Lua MLA (8ú heag.)Ashley, Raymond Harman. Chemical Calculations. 2d ed., rev. Van Nostrand, 1918.
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