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Web Soil Survey (WSS) provides soil data and information produced by the National Cooperative Soil Survey. It is operated by the USDA Natural Resources Conservation Service (NRCS) and provides access to the largest natural resource information system in the world.
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Over 41,000,000 items including books, manuscripts, computer data files, maps, computer programs, musical scores, films and slides, newspapers, journals, sound recordings, magazines, videotapes. Does not include book chapters or individual articles in journals, magazines, and newspapers.