TY  - BOOK
AU  - Sears,Paul Bigelow
TI  - Deserts on the march
SN  - 0806116676
AV  - GF503 .S42 1959
U1  - 333.7/2/0973 
PY  - 1959///]
CY  - Norman
PB  - University of Oklahoma Press
KW  - Man
KW  - Influence on nature
KW  - United States
KW  - Local
KW  - Conservation of natural resources
KW  - Agricultural ecology
KW  - Desertification
N1  - Includes index
ER  -