TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Recommended practice for guarding of pumping units: API Recommended practice 11ER (RP 11ER)
U1  - Caja 7-A 
PY  - 2022///
CY  - 4Washington
PB  - American Petroleum Institute, API
KW  - Normalización
KW  - Normas API
KW  - Unidades de bombeo
ER  -