TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Metal ball valves - flanged, threaded, and welding ends: API Standard 608
U1  - Caja 17 
PY  - 2009///
CY  - Washington
PB  - American Petroleum Institute, API
KW  - CaÃ±erÃ­as
KW  - NormalizaciÃ³n
KW  - Normas API
KW  - RefinaciÃ³n
ER  -