1. Alexander, I.J. and R.I. Fairley. 1983. Effects of N fertilization on populations of fine roots and mycorrhizas in spruce humus. Plant Soil 72: 49–53.
2. Ausmus, B.S., G.J. Dodson, and D.R. Jackson. 1978. Behavior of heavy metals in forest microcosms, IE. Effects of litter-soil carbon metabolism. 1 Water Air Soil Pollu. 10: 19–26.
3. Babich, H., R. J.F. Bewley, and G. Stotzky. 1983. Application of the “ecological dose” concept to the impact of heavy metals on some microbe-mediated ecologic processes in soil. Arch. Environ. Contam. Toxicol. 12: 421–426.
4. Becking, J.H. 1974. Frankiaceae Becking. In R.E. Buchanan and N.E. Gibbons, eds., Bergey’s Manual of Determinative Bacteriology. Williams and Wilkens, Baltimore, MD, p., 701.
5. Bewley, R.J.F. and G. Stotzsky. 1983a. Effects of cadmium and zinc on microbial activity in soil: Influence of clay minerals. Part I: Metals added individually. Sci. Total Env. 31: 41–55.