1. Sulfur Isotope Ratios of Coals and Oils Used in China and Japan.
2. 2. Y. Sato, “Soil Chemistry”, ed. M. Ichikuni, 1989, Japan Society of Chemistry.
3. 3. D. R. Parker, L. W. Zelazny, and T. B. Kinraide, “Environment Chemistry and Toxicicology of Aluminum”, ed. T. E. Lewis, 1989, Lewis Publishers, Inc.
4. 4. G. F. Vance, F. J. Stevenson, and F. J. Sikora, “The Environmental Chemistry of Aluminum”, ed. G. Sposito, 1996, CRC Press Inc.
5. 5. F. Thoma, A. Maison, J. Y. Bottero, and P. Tekely, “Nuclear Magnetic Resonance Spectroscopy in Environmental Chemistry”, ed. M. A. Nanny, R. A. Minear, and J. A. Leenheer, 1997, Oxford University Press, New York.