Tell Ertl Oil Shale Repository

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Tell Ertl Oil Shale Repository

The Tell Ertl Oil Shale Repository was established in 1989 by the Tell Ertl Family to support research on oil shale and the oil shale industry, with an emphasis on the western United States. Although the collection includes materials from the early 1900s, the majority of items represent the 1970s-1980s, reflecting cycles of interest in oil shale development.

Using the Repository

Library Catalog

Digital Tell Ertl

Oil Shale (research guide)

Note: The Repository is currently CLOSED. Please contact the Library's Info Desk, 303-273-3694, for more information.


  • Repository shelves are "closed" to users. Library staff will retrieve materials for you.
  • Identify the items you need:
    • Search the Library Catalog
    • Use a finding aid (below)
    • Contact the Library Reference Desk.
  • Materials don't circulate, and must be used under staff supervision.
  • Duplication (photocopies, digital copies) --
    • Duplication is subject to copyright restrictions and the physical condition of the item.
    • No self-service photocopying.
    • You must obtain permission to use your own camera or scanner. Some restrictions may apply.
    • You can order copies via the Library's for-fee copy service.


Maps & Drawings

Maps and drawings from collections are listed for the following:






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