http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Soil survey of the Socorro and Rio Puerco areas, New Mexico
27 pages : 2 plates on 1 leaf, 2 maps (1 folded) ; 24 cm.
In cooperation with the New Mexico Agricultural Experiment Station.
U. S. Dept. of Agriculture. Bureau of Chemistry and Soils. [Soil survey report] ; Series 1929, no. 2