International Geological Congress : report of the eighteenth session, Great Britain, 1948. Part 7. Symposium and proceed. of sect. F. The geology, paragenesis and reserves of the ores of lead and zInc /
Agard, J.
International Geological Congress : report of the eighteenth session, Great Britain, 1948. Part 7. Symposium and proceed. of sect. F. The geology, paragenesis and reserves of the ores of lead and zInc / J. Agard; K. C. Dunham. - London : International Geological Congress, 1950.
International Geological Congress : report of the eighteenth session, Great Britain, 1948. Part 7. Symposium and proceed. of sect. F. The geology, paragenesis and reserves of the ores of lead and zInc / J. Agard; K. C. Dunham. - London : International Geological Congress, 1950.