Smith, L. H. (1951). Soil survey of Clallam County, Washington (Issued April 1951.). United States Department of Agriculture.
Chicago-Zitierstil (17. Ausg.)Smith, Leslie Herbert. Soil Survey of Clallam County, Washington. Issued April 1951. Washington, DC: United States Department of Agriculture, 1951.
MLA-Zitierstil (9. Ausg.)Smith, Leslie Herbert. Soil Survey of Clallam County, Washington. Issued April 1951. United States Department of Agriculture, 1951.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.