TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Design calculations for sucker rod pumping systems (conventional units): API Technical report 11L
U1  - Caja 7-A 
PY  - 2008///
CY  - Washington
PB  - American Petroleum Institute, API
KW  - Normalización
KW  - Normas API
KW  - Varillas de bombeo
ER  -