Before the Fire department of the city of New York, Board of hazardous trades in the matter of the hearing relative to proposed classification and passage of rules and regulations in connection with the refrigerant Freon (Dichloro-Difluoro-Methane, also known as F-12 and K-12)

by Williams, E. T. (Engineer), John Kenlon, New York (N.Y.). Fire Department. Board of hazardous trades, Inc Kinetic Chemicals