Works of "Research Collection"
Place Collected: Tsumeb Mine
Place Collected: Glen Lake Mine
Place Collected: Somerset
Place Collected: Tsumeb Mine
Place Collected: Swartbooitdrif on the Kunene River
Place Collected: 2600' level
Place Collected: Quiruvilca Mine
Place Collected: Mont St.- Hilaire
Place Collected: Foote Mine
Place Collected: Tantalite Valley Mine
Place Collected: 1600 Level
Place Collected: 1200 Level