Generally, the Library does not pay for vertical file materials. Instead, these items are acquired through requests by mail, pick-up of free copies, photocopies, gifts, clippings, etc. Materials are provided on all fifty states, selected foreign countries, contemporary issues, and other subjects which seem to lend themselves to the vertical file format. The collection is more in-depth in its coverage of Wyoming, particularly Campbell County and Gillette. Other counties of northeastern Wyoming are more fully developed than other parts of Wyoming.
More importance is placed on collecting local and county information than on state information.
This collection is updated as time allows. Much of it continues to be replaced with electronic sources. Materials are generally not discarded unless a replacement is available.