TY  - BOOK
AU  - Penman, David,
AU  - Penman, J.S.
TI  - The principles and practice of mine ventilation: being a treatise on modern methods of mine ventilation and Machinery, with a consideration of deep mine problems, explosions, fires, rescue and recovery work, and cognate subjects 
AV  - TN301 P45
PY  - 1927///
CY  - London
PB  - C. Griffin
KW  - Ventilación de minas
ER  -