TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Recommended practice for classification of locations for electrical installations at petroleum facilities classified as class I, division 1 and division 2. 500. 2nd ed: API Recommended Practice 500
U1  - Bibliorato 
PY  - 1997///
CY  - Washington
PB  - American Petroleum Institute, API
KW  - Normalización
KW  - Normas API
ER  -