North, Oliver S.
Mineral Processing Patents Issued During 1966 / by Oliver S. North - Virginia : Oliver D. North , 1967 - 230 pages .: tanle, illustrations .; 24 cm
Includes indexs
Mineral industries --Patents--Periodicals
669.0027 / NOR 1967
Mineral Processing Patents Issued During 1966 / by Oliver S. North - Virginia : Oliver D. North , 1967 - 230 pages .: tanle, illustrations .; 24 cm
Includes indexs
Mineral industries --Patents--Periodicals
669.0027 / NOR 1967