[Proceedings of the 26th Seminar on Environmental Hygiene. "Ecological Animal Raising" Hannover, 27 February 1998].
D000822:Animal Husbandry / Q000379:methods*; D000818:Animals; D000829:Animals, Domestic; D004463:Ecology
26 Seminar Umwelthygiene Okologische Tierhaltung. Hannover, 27 Februar 1998.