National Fire Protection Association, Illustrated Dictionary of Fire Service Terms, Jones & Bartlett Publishers, MA. USA 2006. https://books.google.com.kw/books?id=W0WIRa3Gl4QC& printsec=frontcover&source=gbs_ge_summary_r&cad=0# v=onepage&q&f=false, (Fr Srvc - Amer) {141}
NFPA 53 Recommended Practice on Materials, Equipment, and Systems Used in Oxygen-Enriched Atmospheres, 2004 ed. https://www.nfpa.org/assets/files/AboutTheCodes/53 /53-F2009-ROP.pdf, (Recmm Prac: on Mtrl, Equip and Sys Used in Oxy-Enriched Atm - Amer) {209 NFC}