Document Type : Research Paper
Authors
1 M.Sc student for animal husbandry management of Gorgan university agricultural sciences & natural resources
2 Assistant professor, faculty of animal science of Gorgan university agricultural sciences & natural resources
3 Assistant Professor, department of agricultural economics university of Tehran, faculty of agricultural sciences & natural resources
4 P.H.D student for agricultural economics university of Tarbiat Modares, faculty of agriculture
5 P.H.D student for agricultural economics university of Tehran, faculty of agricultural sciences & natural resources
Abstract
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