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二级参考文献3
1张文灿,CLARE RENME.加拿大如何创造一流的奶牛遗传物质.
2美国农业部动物遗传改良计划实验室(AIPL)网站(ww.aipl.arsusda.gov)
3PAUL VANRADEN. Net Merit: Measure of Lifetime Profil:Inbreeding: Continued Climb: Crossbreeding:Implications for Dairy.NAAB International Dairy Press Tour, 2001
