The volume documents the field work of Robert J. Horodyski in California and Nevada, 1989. Begins with a dated list of expenses (January 4 - 11). Entries are dated and include descriptions of terrain, travel routes, location information, descriptions of specimens collected including identifiers RH89-1-6-1 to RH89-1-7-3. Locations cover the vicinity of Johnnie Nevada and Pahrump Valley, California.
Many of SIA's holdings are located off-site, and advance notice is recommended to consult a collection. Please email the SIA Reference Team at osiaref@si.edu.