"thomas, l j. "
an introduction to mining: / l.j. thomas - 1 ed. - australia : methuen 1978. - "ix, 471p.; 24 cm."
0 454 00087 1
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622. 099 4 tho
an introduction to mining: / l.j. thomas - 1 ed. - australia : methuen 1978. - "ix, 471p.; 24 cm."
0 454 00087 1
--
622. 099 4 tho