The Economic Definition Of Ore : Cut-Off Grades In Theory And Practice / by Kenneth F. Lane - 1st.ed. - London : Mining Journal Books Limited , 1988 - x, 149 p.: graph, ill.; 22 cm
Includes bibliographical references ( p.: 146 - 149 )
0900117451 RM 85.65
--Earth Sciences of North America--Ore
557.3 LAN