1. Alexander, M., Introduction to Soil Microbiology: 1 (1977).
2. ALLAWAY, W.H., SULFUR IN NUTRITION OF PLANTS AND ANIMALS, SOIL SCIENCE 101: 240 (1966).
3. DAVIS, J. H., FLORIDA GEOLOGICAL SURVEY 25: 1 (1943).
4. Altschuler, Z. S., Proceedings of the 10th International Congress on Sedimentology 1: 18 (1978).
5. ANDERSON, G, SOIL COMPONENTS 1: 333 (1975).