Hans Spoolder. (1998). Effects of food motivation on stereotypies and Aggression in group housed sows. The Netherland: Wageningen.
シカゴスタイル引用形Hans Spoolder. Effects of Food Motivation On Stereotypies and Aggression in Group Housed Sows. The Netherland: Wageningen, 1998.
MLA引用形式Hans Spoolder. Effects of Food Motivation On Stereotypies and Aggression in Group Housed Sows. The Netherland: Wageningen, 1998.
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