Note: The search window along the top searches all of the Sage Knowledge reference titles.
To search the Federal Regulatory Directory alone, scroll down below the title to Search within Book.
Search "clean air act" and select the entry for the Environmental Protection Agency.
Search "clean air act" or combine the phrase with additional key words, e.g. "clean air act" and kentucky.
"clean air act" and implementation
"National Ambient Air Quality Standards"
"state implementation plans" and "National Ambient Air Quality Standards"