http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
International Conference on Soil Science. Message from the President of the United States transmitting report by the Secretary of State, concerning a request made by the Secretary of Agriculture that legislation be enacted that will give congressional sanction to the holding of an International Conference on Soil Science in the United States in 1927
International conference on soil science
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ProQuest U.S. Serial Set Digital Collection