Yazar
paul b sears
22 cilt bulundu.
Cilt sonuçları
Deserts on the march / by Paul B. Sears
Paul B. Sears · University of Oklahoma Press
231 sayfa · 1935
Human beings / Influence on nature / Agriculture / Natural resources
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
That man may survive
Paul B. Sears · Institute of Man and Science
64 sayfa · 1965
Environmental policy / Citizen participation / Conservation of natural resources
The natural vegetation of Ohio
Paul B. Sears · Ohio Journal of Science
Sayfa sayısı yok · 1926
Phytogeography / Plants / Vegetation boundaries