NFPA 1852 Standard on Selection, Care, and Maintenance of Open-Circuit Self-Contained Breathing Apparatus (SCBA), 2002 ed. https://www.nfpa.org/assets/files/AboutTheCodes/18 52/1852-F2007-ROP.pdf, (Std: Selection, Care, and Maintenance of Open-Circuit Self-Cont Breathing Aptus Self-Cont Breathing Aptus - Amer) {412 NFC}