TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Measuring the long-term conductivity of proppants: API Recommended Practice 19D
U1  - caja 11 
PY  - 2008///
CY  - Washington
PB  - American Petroleum Institute, API
KW  - Normalización
KW  - Normas API
N1  - ISO 13503-5 (identical), Part5: procedures for measuring the long-term conductivity of proppants
ER  -