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Improved National Calculation Procedures to Assess Energy Requirements, Nitrogen and VS Excretions of Dairy Cows in the German Emission Model GAS-EM

Ulrich DämmgenHans-Dieter Haenel

出版	2009
URL	http://books.google.com.hk/books?id=6JC_uQEACAAJ&hl=&source=gbs_api