The collection dates almost entirely from the 1970s. One major exception is a series of photocopied correspondence from the 1950s involving the Prehistoric Indian Museum Neitzel founded and directed in Marksville. The collection is organized into series. The first contains general correspondence. The Subject Series is arranged in alphabetical order and contains correspondence, work papers, maps, notes, newsletters, etc. The next two series are Publication and Writings. The latter includes both draft and published material. Finally, the notebooks contain notes Neitzel kept which relate to several of his publications. Most of the oversized maps in the last series came from the subject files.

This collection was donated by Mrs. Robert S. Neitzel.