Ryan, G. W., W. A. Carothers, G. E. Moore, and H. T. Bhattacharyya. 1980. Attack: emergence ratio as an indicator 6f area southern pine beetle population trends and expected timber mortality in the Piedmont of Georgia. Pages 164-168 in F. M. Stephen, J. L. Searcy, and G. D. Hertel (eds.), Modeling southern pine beetle populations. United States Department of Agriculture, Forest Service, Southeast Area State and Private Forestry, Technical Bulletin 1630. 174 p.
Ryan et al. 1980
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