http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Vols. for <1987-> called also <34th-> annual report.
Vols. for -1969-71 issued by: University of Nebraska (Lincoln campus), Conservation and Survey Division; <1987-> by: Conservation and Survey Division, Institute of Agriculture and Natural Resources, the University of Nebraska-Lincoln; 1972- prepared in cooperation with: U.S. Geological Survey, Water Resources Division; <1987- > cooperative projects with U.S. Geological Survey, Water Resources Division, Nebraska District.