Service, U. o. T. P. E. (1971). Fishing tools and techniques. Austin, Tex..
Lua i Stíl Chicago (17ú heag.)Service, University of Texas. Petroleum Extension. Fishing Tools and Techniques. Austin, Tex., 1971.
Lua MLA (9ú heag.)Service, University of Texas. Petroleum Extension. Fishing Tools and Techniques. Austin, Tex., 1971.
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