"thomas, l j. "
an introduction to mining: / l.j. thomas - 1 ed. - australia : methuen 1978. - "ix, 471p.; 24 cm."
0 454 00087 1
TN145 / .T46 1978
an introduction to mining: / l.j. thomas - 1 ed. - australia : methuen 1978. - "ix, 471p.; 24 cm."
0 454 00087 1
TN145 / .T46 1978