Program: HathiTrust Digital Library

  • Publisher: Colorado Geological Survey, Dept. of Natural Resources
  • Print ISSN:
  • Electronic ISSN:
  • OCLC Number: 20727659
  • Validation: None
  • Retention: permanent
  • Institution: HathiTrust
  • Facility:
  • OCLC Symbol: HATHI
  • Holdings Format: Print
Materials Archive Action Date of Action Program Status/Note
1875/1975-1975/1980; 1981/1982; 1983; 1984/1989
committed to retain 2018-04-06 HTDL