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(1903) Some Weeds of Iowa, 1903. Iowa State University
(1931) Weeds and their Control by R. H. Porter., 1931. Iowa State University
(1934) Lesson Outlines for a Study of Weeds by R. H. Porter, 1934. Iowa State University
(1939) 1939. Statewide Library Project. Library of Iowa, State
(1954) The Climate of Iowa, Introduction by Gerald L. Barger, Special Report No. 7, August 1954. Iowa State University
(1954) The Climate of Iowa, The Occurrence of Freezing Temperatures in Spring and Fall, August 1954. Iowa State University
(1960) The Climate of Iowa, Soil Temperatures at Ames by C.R. Elford and R.H. Shaw, Special Report No. 24, April 1960. Iowa State University
(1962) 1962. The impact of population change on rural community life: The church system. No. 8. Iowa State University
(1962) 1962. The impact of population change on rural community life: The school system. No. 6. Iowa State University
(1962) Proceedings, First Annual Iowa Economic Development Conference, December 7, 1962. Iowa Economic Development Authority
(1965) The Population Change of Eight Southern Iowa Counties, September 1965. Iowa State University
(1972) Proposal for A Demonstration Model of Rural Development (DMORD) in the Upper Explorer Land Area of Iowa submitted by National Center for Human Development, August 31, 1972. Iowa State University
(1973) 1973. Iowa County Zoning Law Explained: Iowa Code Chapter 358A. Iowa State University Extension
(1973) Handbook of Resource Material for the Task Force on the Modernization of Iowa's Transportation System, 1973. Transportation, Department of
(1973) Planning for interagency cooperation in rural development: Card Report 45, February 1973. Iowa State University
(1974) Development and Application of a Model for Multi-County Rural Community Development: Card Report 52T, 1974. Iowa State University
(1974) Public Transportation and the Work Trip, A Survey of Area Employers prepared by the Johnson County Regional Planning Commission, December 1974. Transportation, Department of
(1975) Considerations in Planning and Operating Transportation Systems for Older Americans and Public Systems in Rural Areas by Douglas J. McKelvey, May 1975. Transportation, Department of
(1976) An Hourly Precipitation Model for Ralston Creek, August 1976. University of Iowa
(1979) An Examination of the Effectiveness of County Zoning to Preserve Prime Agricultural Land in Iowa, January 1979. University of Iowa
(1981) Background of Cooperative Extension Work in Iowa and Provisions of the County Agricultural Extension Law, December 1981. Iowa State University
(1999) 1999 Final Report from the Commission on Urban Planning, Growth Management of Cities, and Protection of Farmland. Legislative Services Agency (Legislative Service Bureau)
(2000) Generation of Simulated Daily Precipitation and Air and Soil Temperatures, January 2000. Iowa State University
(2006) Annual Report, Center for Sustainable Rural Livelihoods, Iowa State University 2005-2006, 2006. Iowa State University
(2010) Inference Based on Alternative Bootstrapping Methods in Spatial Models with an Application to County Income Growth in the United States, May 2010. Iowa State University
