TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Environmental protection for onshore oil and gas production operations and leases: API recommended practice 51R
U1  - Caja 11-A 
PY  - 2009///
CY  - Washington
PB  - American Petroleum Institute, API
KW  - Normas API
KW  - Normalización
ER  -