| Ann Arbor, MI Andrew C. Roberts Geol. Surv. of Canada Ottawa George W. Robinson Seaman Mineral Museum... on calcite, from the El Oriente tunnel, Chivor mine, Boyaca, Colombia. William Larson collection; Van...1932. In that same year, after a visit to Broken Hill, New South Wales, Howard’s interest in mineral collecting...of the first Director of Research for the Broken Hill Proprietary Company Limited, now BHP-Billiton Limited...celebrate the centenary of the discovery of the Broken Hill orebody, and attended the 1983 Tucson Show where |
