[Sperma of reproduction bulls from the biological and economical aspects].
D000367:Age Factors; D000818:Animals; D002417:Cattle; D005860:Germany, West; D008297:Male; D012098:Reproduction; D012621:Seasons; D012661:Semen / Q000032:analysis*; D013094:Spermatozoa / Q000032:analysis
Das Sperma von Besamungsbullen aus biologischer und ökonomischer Sicht.