Wilder, Robert L.; United States. Public Land Law Review Commission; Oregon State University. Cooperative Extension Service(Corvallis, Or. : Cooperative Extension Service, Oregon State University, 1972)
Oregon State University. Cooperative Extension Service; United States. Public Land Law Review Commission(Corvallis, Or. : Cooperative Extension Service, Oregon State University, 1972)
Oregon State University. Cooperative Extension Service; United States. Public Land Law Review Commission(Corvallis, Or. : Cooperative Extension Service, Oregon State University, 1971)