TY  - BOOK
AU  - Poulson, E. N.
AU  - Youngs, F. O.
ED  - E.U.A. Department of Agriculture.
TI  - Soil survey of the upper Gila Valley area, Arizona
PY  - 1938///
CY  - (Washington)
PB  - Bureau of Chemistry and Soils
KW  - Suelos
KW  - Arizona
ER  -