INVESTIGATIONS ON KEEPING METHODS OF LAYING HENS UNDER CONSIDERATIONS OF ETHOLOGICAL DEMANDS

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作者：
WEGNER, RM
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来源：
LANDBAUFORSCHUNG VOLKENRODE | 1982年 / 32卷 / 03期
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S [农业科学];
学科分类号：
09 ;
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页码：162 / 166
页数：5
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