Guenthner, J. (2002). The International Potato Industry. ELSEVIER.
Lua i Stíl Chicago (17ú heag.)Guenthner, Joseph. The International Potato Industry. ELSEVIER, 2002.
Lua MLA (8ú heag.)Guenthner, Joseph. The International Potato Industry. ELSEVIER, 2002.
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