Probable ore, [17], [19], [20], [21].
Producing stage of mine, [58].
Profit and loss account, [179].
factors determining, [2].
in sight, [16].
Proportional charges, [170].
Prospecting stage of mine, [58].
Prospective ore, [19].
value, [21].
Probable ore, [17], [19], [20], [21].
Producing stage of mine, [58].
Profit and loss account, [179].
factors determining, [2].
in sight, [16].
Proportional charges, [170].
Prospecting stage of mine, [58].
Prospective ore, [19].
value, [21].