TY  - BOOK
AU  - Hall, C. J.,
TI  - Mine ventilation engineering
SN  - 0895202735
AV  - TN301 H34
PY  - 1981///
CY  - New York
PB  - American institute of mining, metalurgic, and petroleum engineers, society of mining engineers
KW  - Ventilación de minas
ER  -