TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Guidelines for safe work in inert confined spaces in the petroleum and petrhochemical industries: API standard 2217A
U1  - Caja 24-A 
PY  - 2009///
CY  - Washington
PB  - American Petroleum Institute, API
KW  - Normas API
KW  - Normalización
ER  -