Air quality and outdoor activity guidance for schools
Contributors: United States. Department of Health and Human Services; Centers for Disease Control and Prevention (U.S.)
Publisher: U.S. Environmental Protection Agency, Department of Health and Human Services, Centers for Disease Control and Prevention
Published: 2013
Place of publication: Research Triangle Park, N.C.]
Language: eng
Subjects: Air quality; School children; Health and hygiene; AIRNow Program (U.S.)
Notes: Title from title screen (viewed July 11, 2013).

"March 2013."