Code of Federal Regulations, Title 40, Protection of Environment, Part 81, Revised as of July 1, 2017

This print ISBN is the U.S. Federal Government official edition.  40CFR, Pt. 81, continues coverage of Protection of Environment, Environmental Protection Agency (EPA)--Air Programs.  This includes designation of areas for air quality planning purposes.Related items:The Annual CFR Print Subscription can be found here: https://bookstore.gpo.gov/products/code-federal-regulations-subscription-service-2017-paperback-0CFR Title 40, Protection of Environment publications can be found here: https://bookstore.gpo.gov/catalog/cfr-title-40-protection-environmentEnvironment and Nature resources collection is available here: https://bookstore.gpo.gov/catalog/environment-nature