REFERENCES
- Povondra , P. and Hejl , V. 1976 . Collect. Czech. Chem. Commun. , 41 : 1343
- Danilova , V. V. 1961 . Petrog. Mineral. i Geokhim. , 64 : 98
- Hendel , Y. 1973 . Analyst , 98 : 450
- Adele , Domingues . 1981 . Ceramica , 27 : 1
- Khan , S. A. and Stone , M. 1980 . Rev. Roum. Chim. , 25 : 9
- Kilroy , W. P. and Moynihan , C. T. 1976 . Analytica Chimica Acta , 83 : 38
- Naka , H. and Kurayasu , H. 1992 . New Orleans, LA Pittsburgh Conference paper # 608
- Jones , A. H. 1965 . Anal. Chem. , 37 : 1761