TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Recommended practice for oil and gas well servicing and workover operations involving hydrogen sulfide: API recommended practice 68 (RP 68)
U1  - Caja 12 
PY  - 1998///
CY  - Washington
PB  - American Petroleum Institute, API
KW  - Normas API
KW  - Normalización
ER  -