1. Department of Geological Sciences and Environmental StudiesBinghamton University Binghamton NY 13902 USA
2. Department of Geology and GeophysicsTexas A&M University College Station TX 77843 USA
3. Department of ArchitectureTexas A&M University College Station TX 77843 USA
4. Concrete Preservation Institute Chico CA 95926 USA
5. National Park ServiceGolden Gate National Recreation Area San Francisco CA 94019 USA
6. Historical Consultant Fairfax CA 94930 USA