Code of Federal Regulations, Title 40: Part 80 (Protection of Environment) Air Programs: Revised as of July 2020 (Paperback)

Code of Federal Regulations, Title 40 Protection of the Environment 52.01-52.1018, Revised as of July 1, 2020: Part 1 (Paperback)

Code of Federal Regulations, Title 30 Mineral Resources 1-199, Revised As of July 1, 2020 (Paperback, Revised)

Code of Federal Regulations, Title 32 National Defense 1-190, Revised As of July 1, 2020 (Paperback, Revised)

Code of Federal Regulations, Title 18 Conservation of Power and Water Resources 1-399, Revised as of April 1, 2020: Part 1 (Paperback)

Code of Federal Regulations, Title 07 Agriculture 700-899, Revised As of January 1, 2020 (Paperback, Revised)