Trotter, Donald A.
The lighting of underground mines - 1st ed. - New Delhi Trans Tech Publications 1982 - Mining engineering series .
0-87849-041-8
622.477.7 / T7
The lighting of underground mines - 1st ed. - New Delhi Trans Tech Publications 1982 - Mining engineering series .
0-87849-041-8
622.477.7 / T7