Some of this material was recorded by the AHS - Rio Colorado Division for educational purposes or to document field trips and special projects. Several appear to be duplicates of items already included in the oral history collections. The Hanrath and Hopkins CDs appear to be oral histories neither of which were included in the YPG or Yuma Oral History Collections.
Consists of VHS cassettes tapes, reel to reel tapes, CDs and DVDs. Arranged by format and alphabetically within. Condition is unknown.
