Bradley, J. T., & Guthrie, J. A. (1953). An analysis of convention business in Washington State: A sample survey of five cities. State College of Washington, School of Economics and Business, Bureau of Economic Research.

Bradley, Joseph Thomas, and John Alexander Guthrie. An Analysis of Convention Business in Washington State: A Sample Survey of Five Cities. Pullman: State College of Washington, School of Economics and Business, Bureau of Economic Research, 1953.

Bradley, Joseph Thomas, and John Alexander Guthrie. An Analysis of Convention Business in Washington State: A Sample Survey of Five Cities. State College of Washington, School of Economics and Business, Bureau of Economic Research, 1953.