TY - BOOK ED - American Gas Association, AGA TI - Interchangeability of other fuel gases with natural gases: Research Bulletin number 36 U1 - 665.74 A259 0015167 PY - 2002/// CY - Cleveland, Ohio PB - American Gas Association, AGA N1 - En portada: Conducted under supervision of Committee on mixed gas research. Joint Committee of natural gas department and technical section ER -