What's special about chemical, biological, radiological, and nuclear (CBRN) air-purifying respirators (APR)?
Subtitle: NOISH fact sheet
Contributors: Szalajda, Jonathan V., author; National Institute for Occupational Safety and Health
Series: DHHS (NIOSH) publication -- no. 2013-157; DHHS publication -- no. (NIOSH) 2013-157
Publisher: Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health
Published: 2011
Place of publication: Cincinnati, OH
Language: eng
Subjects: Breathing apparatus
Notes: Title from title screen (viewed on Nov. 25, 2013).

"Authors: Richard W. Metzler ... Jonathan V. Szalajda"--Page [5].

"September 2013"--Page [6].