Não informado. (1968). Abstracts of Transportation and Storage. American Petroleum Institute.
Lua i Stíl Chicago (17ú heag.)Não informado. Abstracts of Transportation and Storage. New York: American Petroleum Institute, 1968.
Lua MLA (8ú heag.)Não informado. Abstracts of Transportation and Storage. American Petroleum Institute, 1968.
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