TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Recommended practice for classification of locations for electrical installations at petroleum facilities classified as class I, zone 0, zone 1, and zone 2: API Recommended Practice 505
U1  - Caja 14 
PY  - 1997///
CY  - Washington
PB  - American Petroleum Institute, API
KW  - Normas API
KW  - Normalización
ER  -