Puget Sound Regional Transportation Study

H. James Brown, J. Royce Ginn, Franklin J. James, John F. Kain, and Mahlon R. Straszheim, Empirical Models of Urban Land Use: Suggestions on Research Objectives and Organization (NBER, 1972), chap. 3, https://www.nber.org/books-and-chapters/empirical-models-urban-land-use-suggestions-research-objectives-and-organization/puget-sound-regional-transportation-study.