TY  - BOOK
AU  - Barton,W.R.
TI  - Columbium and Tantalum - A Materials Survey: Information Circular
T2  - 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
PY  - 1962///
PB  - United States Department of the Interior
KW  - Conferences - Meetings
ER  -