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ESTERGREEN VL, 1978, ADV ANIMAL BREED SEP, P10
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PREGNANCY DIAGNOSIS IN COW FROM MILK PROGESTERONE CONCENTRATION
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[5]
MILK PROGESTERONE AS A PARAMETER FOR FERTILITY-CONTROL IN CATTLE - METHODOLOGICAL APPROACHES AND PRESENT STATUS OF APPLICATION IN GERMANY
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BRITISH VETERINARY JOURNAL,
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[7]
USE OF PROGESTERONE CONCENTRATIONS IN PLASMA AND MILK IN DIAGNOSIS OF PREGNANCY IN DOMESTIC CATTLE
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SHELDRICK EL, 1978, J REPRODUCTION FERTI, V51, P473
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VANDEWIEL DFM, 1978, TIJDSCHR DIERGENEESK, V103, P91