000
00274nam a2200097Ia 4500
008
180710s9999 xx 000 0 und d
020
_a
209453
245
_a
Handbook of Requirements Governing the Operation of Mines
260
_a
Toronto
_b
Queen's Printer
_c
1971
300
_a
267p.
999
_c
65640
_d
65640