TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Recommended practice for drilling and well servicing operations involving hydrogen sulfide: API recommended practice 49
U1  - Caja 11-A 
PY  - 2001///
CY  - Washington
PB  - American Petroleum Institute, API
KW  - Normalización
KW  - Normas API
ER  -