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41. "Comprehensive Guide to Land and Water Use in National Wildlife Refuges"

42. "Index and Guide to Topographic Maps and Geologic Folios by the U.S. Department of Interior: Geological Survey"

43. "Listing of Electric Companies and Voltage Lines in the United States: 1950s Map Notations"

44. "Cartographic Documentation of Riverton Irrigation Project, Wyoming by The Bureau of Reclamation, United States Department of Interior"

45. "An Exploration Guide to Outdoor Activities and Landmarks in Oklahoma"

46. Corps of Engineers Division and District Boundaries for River and Harbor and Flood Control

49. "Detailed Road Classification and Infrastructure Assessment in Oklahoma - 1948"