O. Byron Copper has written:
'Whose is the sin?'
Ulf O. V. Bergqvist has written: 'Copper' -- subject(s): Copper, Copper in the body, Toxicology
T. O. Llewellyn has written: 'Recovery of rutile from a porphyry copper tailings sample' -- subject(s): Copper ores, Rutile, Tailings (Metallurgy) 'Recovery of silicon carbide from granite sludge' -- subject(s): Silicon carbide
O. Petrash has written: '\\'
O. Sosin has written: '\\'
O. A. Sergeeva has written: '\\'
O. Fedorova has written: 'Mozhaisk'
O. A. Newlin has written: 'If I were gold'
O. Wolff has written: 'Ouvrard'
O. A. Pashchenko has written: 'Rodichi'
O. Vandeputte has written: 'Dutch'
O. Carlgren has written: 'Anthozoa'
O. O. Roberts has written: 'A few hints on cholera'