1. Gradient Analysis in Swamp Forests
2. The Original Forest Types of Southern New England
3. The Species-Area Curve
4. S. A. Cain, and G. M. Oliveria Castro , 1959 . Manual of Vegetation Analysis . Harper and Brothers, New York, New York, 319 pp.
5. W. J. Dixon, 1975 . Biomedical Computer Programs . University of California Press. Berkeley, California, 789 pp.