TY  - BOOK
AU  - Roberts, Albert F., 1911-
TI  - Mine Ventilation
U1  - 622.42 23
PY  - 1960///
CY  - London
PB  - Cleaver-Hume Press Ltd.
KW  -  Mine ventilation
N1  - Includes bibliographical references and indexs ( p.: 357-363)
ER  -