"The Walnut Creek Watershed: An Environmental Assessment for Development Potential" [correspondence and reference material], CRP 383, Spring 1976, 1984

"The Walnut Creek Watershed: An Environmental Assessment for Development Potential" [correspondence and reference material], CRP 383, Spring 1976, 1984, Box: COLT019, Folder: 5. Peter Oakley Coltman collection, COLT. Alexander Architectural Archives. https://archives.lib.utexas.edu/repositories/2/archival_objects/86869 Accessed September 26, 2026.