http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Soil survey of Beadle County, South Dakota
South Dakota State College of Agriculture and Mechanic Arts
iii, pages 1475-1499 pages, 1 unnumbered folded leaf of plates : maps (1 color) ; 23 cm.
by W.I. Watkins, C.E. Deardorff, J.G. Hutton, and J.A. Machlis ; U.S. Department of Agriculture, Bureau of Soils in cooperation with the South Dakota College of Agriculture.
Advance sheets--field operations of the Bureau of Soils ; 1920