1. Determination of tungsten in silicates and natural waters;Chan;Anal. Chim. Acta,1967
2. Chimie analytique quantitative, 2;Charlot,1974
3. Lithium borate decomposition of rocks, minerals and ores;Cremer;Am. Mineral.,1976
4. Tungsten ores CT-1, BH-1, and TLG-1: Their characterization and preparation for use as certified reference materials;Faye;Can. Met., Report,1976
5. U.S. Geological Survey standards. II. First compilation of data for the new U.S.G.S. rocks;Flanagan;Geochim. Cosmochim. Acta,1969