TY  - BOOK
AU  - Mortlock,Harry Crawford
AU  - Greenawalt,Ross Dilworth
TI  - Erosion and related land use conditions on the Box elder creek project, Nebraska,
T2  - U. S. Soil conservation service. Erosion survey
AV  - S623 .U44 no. 22
PY  - 1941///]
CY  - [Washington
PB  - U.S. Govt. print. off.
KW  - Land use
KW  - Nebraska
KW  - Soil conservation
N1  - 7 fold. maps in pocket
ER  -