Smith, Robert H. T. (1965-01-01). "Method and Purpose in Functional Town Classification". Annals of the Association of American Geographers. 55 (3): 539–548. doi:10.1111/j.1467-8306.1965.tb00534.x. JSTOR2561571.
Smith, Robert H. T. (1965-01-01). "Method and Purpose in Functional Town Classification". Annals of the Association of American Geographers. 55 (3): 539–548. doi:10.1111/j.1467-8306.1965.tb00534.x. JSTOR2561571.