From Nick Zentner.

Jessica Czajkowski (WGS), Danny Denniston (WGS), & Nick Zentner (CWU) | March 21, 2025
Cataloging the Paul Hammond Collection – Portland State University Geology Professor.
Jessica Czajkowski – Assistant State Geologist – Washington Geological Survey
Danny Denniston – Data Specialist – Washington Geological Survey
WA Geology Library: https://www.dnr.wa.gov/programs-and-services/geology/washington-geology-library
WA Geologic Information Portal: https://www.dnr.wa.gov/geologyportal