TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Recommended practice for chemical analysis of barite: API Recommended practice 13K
U1  - Caja 9 
PY  - 2011///
CY  - Washington
PB  - American Petroleum Institute, API
KW  - Fluidos de perforación
KW  - Normalización
KW  - Normas API
KW  - Barita
ER  -