TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Repair and remanufacture of wellhead and tree equipment: API Standard 6AR
U1  - Caja 3-1 
PY  - 2019///
CY  - Washington
PB  - American Petroleum Institute, API
KW  - Normas API
KW  - Normalización
ER  -