Soil Conservation on the Downs Seminar, Toowoomba, Queensland, & Agricultural Technologists of Australasia. (1977). Soil Conservation on the Downs Seminar, Toowoomba D.D.I.A.E., 12 August 1977. Agricultural Technologists of Australasia.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Soil Conservation on the Downs Seminar, Toowoomba, Queensland, và Agricultural Technologists of Australasia. Soil Conservation on the Downs Seminar, Toowoomba D.D.I.A.E., 12 August 1977. Toowoomba, Q.: Agricultural Technologists of Australasia, 1977.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Soil Conservation on the Downs Seminar, Toowoomba, Queensland, và Agricultural Technologists of Australasia. Soil Conservation on the Downs Seminar, Toowoomba D.D.I.A.E., 12 August 1977. Agricultural Technologists of Australasia, 1977.