About SUZUKI J
About Yamagata Mogami Livestock Hygiene Serv. Center, Yamagata, JPN
About KATOH N
About National Inst. Animal Health, Sapporo, JPN
About Japanese Journal of Veterinary Science
About spectrophotometer
About Vitamin A
About Cattle
About Retinol
About β-Carotine
About 分光光度計
About ビタミンA
About 簡易
About 測定法