Robert K. Hitchcock
Edmund Curtis
Jinling da xue. Nong ye jing ji xi
Jeanne B. Perkins
L. Dudley Stamp
Petty, William Sir
Hildegard Binder Johnson
Vermont. Department of Forests, Parks, and Recreation
Dept.of Environment
United States. Congress. Senate. Committee on Private Land Claims
Anuradha Mathur
Rex Walford
Zhongguo tu di kan ce gui hua yuan
United States. General Land Office.
Unknown Author
Universitas Andalas. Fakultas Pertanian
Kenneth R. Pomeroy
United States. Bureau of Agricultural Economics. Land Utilization Program