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The role of office industries in development planning
Barrows, D., (1976)
An analysis of firm relocation patterns in metropolitan Denver, 1974-76
Schmidt, Charles G., (1979)
Distances between United States ports : U.S. Dep. of Commerce, National Oceanic and Atmospheric Administration, National Ocean Survey
(1973)
Income density in the United States
Burghardt, A. F., (1972)