#6 Commemoration to Robert Nielson for Missouri River Basin Land Classification Projects, July 1972. Plaque.
#5 Land Planning and Classification for the Big Horn Basin. BLM, March 1953. #5A Map Supplement A, Vegetation, BLM March 1953. #5B Map Supplement B, Capability, BLM March 1953, #5C Map Supplement C, Erosion Condition #5D Map Supplement D, Proposed Improvements
#3 Missouri River Basin Investigations. Detailed Land Planning and Classification for the Big Horn Basin. BLM, June 1949.
#2 Program Descriptions. The development and Utilization of Land and Water Resources in the Missouri River Basin, Robert D. Nielsen, January 1949.
