By Vickner Steven S.   in American Journal of Agricultural Economics

ISSN:0002-9092|95|2|512-518

Oxford University Press‎(2013)‎

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By Kalaitzandonakes Nicholas   Marks Leonie A.   Vickner Steven S.   in International Journal of Biotechnology

ISSN:0963-6048|7|1-2|161-177

Inderscience Publishers‎(2005)‎

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