1. Mineral trade notes, special supplements 19 and 20 (to v. 25, nos. 4 and 5), Oct. and Nov. 1947. 20. Geology of antimony deposits in Bolivia: [by Federieo Ahlfeld). Bookmark Corporate/Agency Authors: Mines Bureau and Interior Dept. Publisher: Mines Bureau Date: [1917.] SuDoc number: I 28.39/2:(nos.)