Deserts on the march /
Sears, Paul Bigelow, 1891-
Deserts on the march / Paul Bigelow Sears - 3rd. rev. ed. - Norman : University of Oklahoma Press, 1959 - xiii, 178 p. : ill. ; 21 cm.
63-025305
Natural resources--United States
Agriculture--United States
Deserts on the march / Paul Bigelow Sears - 3rd. rev. ed. - Norman : University of Oklahoma Press, 1959 - xiii, 178 p. : ill. ; 21 cm.
63-025305
Natural resources--United States
Agriculture--United States
