Panida Kittiwarawut. (1989) Zinc, copper and related enzyme levels in blood of Thai adults up to 60 years old. Mahidol University,:ม.ป.ท.Panida Kittiwarawut. 1989. Zinc, copper and related enzyme levels in blood of Thai adults up to 60 years old. ม.ป.ท.:Mahidol University,;Panida Kittiwarawut. Zinc, copper and related enzyme levels in blood of Thai adults up to 60 years old. ม.ป.ท.:Mahidol University, 1989. Print.