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Professor of architecture at the University of Michigan. The series in the collection are: Architectural Research, 1932-1983; College of Architecture and Urban Planning, 1967-1985; Correspondence, 1962-1972; Development Index, 1947-1984; and Published Materials, 1930-1982.

The papers of C. Theodore Larson measure 4.0 linear feet and date from 1930 to 1985. The bulk of materials, however, are from 1951 to 1974. The papers contain five series: Architectural Research; College of Architecture and Urban Planning; Correspondence; Development index and Published materials.

Company established by Charles Attwood who was inventor and developer of a system of precast metal frame construction that came to be known as the Unistrut system. The company was originally known as Deceleco. The record group includes background and historical information about Unistrut; job files containing records pertaining to the planning and execution of Deceleco's contracts, 1929-1932; product literature and catalogs, 1927-1981; publications resulting from research into the Unistrut system of construction; and photographs.

The Unistrut Corporation records cover the establishment and development of two companies founded by the architect Charles Attwood. The records offer information about the products produced and sold by these companies. Included in the records are background information pertaining to the Deceleco and Unistrut companies, job files documenting the planning and execution of Deceleco contracts, catalogs and product literature, publications that resulted from research into the Unistrut system of construction, and photographs largely depicting tests of the space frame system designed by Charles Attwood.