Roberts, E. R. The Extraction Of Non-Ferrous Metals / by E. R. Roberts - 1st.ed. - LOndon : Temple Press Limited , 1950 - viii, 181 pages .: illustrations .; 22 cm Includes indexs (p.: 171 - 181 ) ISBN: Subjects--Topical Terms: Nonferrous metals --Metallurgy. Dewey Class. No.: 669 / ROB 1950