Schram, P. J.; Earley, M. W.
view article (9.992496)
National Fire Protection Assoc., Quincy, MA
NFPA HLH-97; LC Card Catalog No. 97-075554,
Electrical Installations in Hazardous Locations. Second (2nd) Edition,
National Fire Protection Assoc., Quincy, MA,
318 p.,
1997