Columbium and Tantalum - A Materials Survey Information Circular
Barton, W.R.
Columbium and Tantalum - A Materials Survey Information Circular - 1 - 110 - Meeting of the Association of African Geological Surveys (ASGA), Cairo, November 27 - December 1, 1971 and Meeting of Directors of the Geological Surveys of Arab States in Cooperation With Arab League Educational Cultural and scientific Organisation (ALECSO) - Cairo, november 24 - December 1, 1971 .
--Conferences - Meetings
Columbium and Tantalum - A Materials Survey Information Circular - 1 - 110 - Meeting of the Association of African Geological Surveys (ASGA), Cairo, November 27 - December 1, 1971 and Meeting of Directors of the Geological Surveys of Arab States in Cooperation With Arab League Educational Cultural and scientific Organisation (ALECSO) - Cairo, november 24 - December 1, 1971 .
--Conferences - Meetings