TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Type testing of process valve packing for fugitive emissions: API Standard 622
U1  - Caja 18-B 
PY  - 2011///
CY  - Washington
PB  - American Petroleum Institute, API
KW  - Normas API
KW  - Válvulas
ER  -