Yazar
paul b sears
21 cilt bulundu.
Cilt sonuçları
Deserts on the march
Paul B. Sears · University of Oklahoma Press
264 sayfa · 1980
Nature / Desertification / Conservation of natural resources / Agricultural ecology / Effect of human beings on
Deserts on the march
Paul B. Sears · University of Oklahoma Press
178 sayfa · 1959
Agriculture / Economic aspects / Economic aspects of Agriculture / Economic conditions / Natural resources
That man may survive
Paul B. Sears · Institute of Man and Science
64 sayfa · 1965
Environmental policy / Citizen participation / Conservation of natural resources