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Lua i Stíl Chicago (17ú heag.)United States department of agriculture; Economic reserch service, Robbin Shoemaker, Joy Harwood, agus Kelly Day-Rubenstein. Economic Issues in Agricultural Biotechnology: Agriculture Information Bulletin Number 762. 2001.
Lua MLA (9ú heag.)United States department of agriculture; Economic reserch service, et al. Economic Issues in Agricultural Biotechnology: Agriculture Information Bulletin Number 762. 2001.
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