Supplement to the soil survey of Garfield County, Oklahoma [electronic resource] / United States Department of Agriculture, Natural Resources Conservation Service ; in cooperation with the Oklahoma Agricultural Experiment Station and the Oklahoma Conservation Commission.
Mode of access: Internet from the USDA web site. Address as of 6/11/2008: http://soildatamart.nrcs.usda.gov/Manuscripts/OK047/0/Garfield.pdf; current access available via PURL.
Note
Title from title screen (viewed June 11, 2008).
"Issued July 2007"--P. iv.
"This supplement provides information to update the original soil survey of Garfield County, Oklahoma, which was issued October 1967'--P. 1.