Encyclopaedia Of World Geography (set Of 25 Vols) - M. Ali Khan, A.Balakishan - Google Books

http://books.google.de/books?id=sso45GT1sOkC&pg=PA203&dq=%22factory+farming%22&hl=de&ei=_GdRTNPaOYuUsQba7q2ZAg&sa=X&oi=book_resu

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