Plantae
Rickard, W. H., and B. E. Vaughan. 1988. Plant community characteristics and responses. Pages 109-179 in W. H. Rickard, L. E. Rogers, B. E. Vaughan, and S. F. Liebetrau, editors. Shrub-steppe: Balance and change in a semi-arid terrestrial ecosystem. Developments in Agricultural and Managed-Forest Ecology 20. Elsevier, Amsterdam, The Netherlands.