Physiological and genetical aspects of egg production in White Plymouth Rock pullets / J.H. van Middelkoop
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Physiological and genetical aspects of egg production in White Plymouth Rock pullets / J.H. van Middelkoop
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Proefschrift Wageningen
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Physiological and genetical aspects of egg production in White Plymouth Rock pullets
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Physiological and genetical as ...... pullets / J.H. van Middelkoop