TY - BOOK ED - American Gas Association, AGA TI - Gas measurement manual: Meter proving- Part 12.0 ; Bell provers - Section 12.1 ; Transfer testing - Section 12.2 ; Field testing -Section 12.3 ; Distribution metering data - Part 13.0 ; In-service performance and meter test programs -Section 13.1 ; Meter records -Section 13.2 U1 - 665.742 A259 0015164 PY - 1978/// CY - Arlington PB - American Gas Association, AGA ER -