Beerepoot, G M Effect of season, genetic line, and sire on growth concentrations of somatotropin in serum of Holstein cows in early lactation. [electronic resource] - Journal of dairy science Sep 1991 - 3202-8 p. digital Publication Type: Journal Article ISSN: 0022-0302 Standard No.: 10.3168/jds.S0022-0302(91)78506-8 doi Subjects--Topical Terms: AnimalsCattle--bloodFemaleGenetic VariationGrowth Hormone--bloodLactation--bloodMilk--metabolismParityProbabilitySeasons