亀井静香と許永中「密会の手帳」--許永中秘書の手帳に度々出てくる「亀井先生」

A sample of dairy farms in Great Britain with a monthly bulk milk somatic cell count of less than 150,000 cells/ml was enrolled into a 12-month prospective study. At the end of the study, a questionnaire on milking practice and other farm management practices was sent to the 482 farmers who had coll... View More