TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Metal plug valves -Flanged, threaded and welding ends: API Standard 599
U1  - Caja 17 
PY  - 2007///
CY  - Washington
PB  - American Petroleum Institute, API
KW  - Normas API
KW  - Normalización
ER  -