195A. Van Denack, Sr. Julia M. and Hanson, H.C., "The Danthonia-Lichen- 

 Moss Community in Washington, D.C., and Vicinity," Jowr. Wash. Acad. 

 Sa., 49,367-371 (1959). 



196. Visher, S.S., "American Dry Seasons — Their Intensity and Frequency," 



Ecology, 30, 365-370 (1949). 



197. Watt, A.S., "Pattern and Process in the Plant Community," Jour. EcoL, 35, 



1-22 (1947). 



198. Weaver, J.E. and Clements, F.E., "Plant Ecology," 2nd Ed., McGraw-Hill 



Book Co., New York, N.Y., 1938. 



199. Weaver, J.E. and Darland, R.W., "A Method of Measuring Vigor in 



Range Grasses," Ecology, 28, 116-162 (1947). 



200. Webb, D.A., "Is the Classification of Plant Communities Either Possible 



or Desirable?" Botan. Tidsskr., 51, 362-370 (1954). 



201. Webster, C.B., "Meritorious Crop in War or Peace, Rescue Grass," 



Southern Seedsman, 7, 11,51 (1944). 



202. Wells, P.V., "An Ecological Investigation of Two Desert Tobaccos," Ecology, 



40,626-644(1959). 

 202A. Whitman, W., Hanson, H.C., and Peterson, R., "Relation of Drouth 

 and Grazing to North Dakota Range Lands," M. Dak. Agr. Expt. Sta. 

 Bull., 320, 1-29(1943). 



203. Whittaker, R.H., "A Criticism of the Plant Association and Climatic 



Climax Concepts," Northwest Set., 25, 17-31 (1951). 



204. Whittaker, R.H., "A Study of Summer Foliage Insect Communities in 



the Great Smoky Mountains," EcoL Monographs, 22, 1-44 (1952). 



205. Whittaker, R.H., "A Consideration of the Climax Theory: the Climax as 



a Population and Pattern," EcoL Monographs, 23, 41-78 (1953). 



206. Whittaker, R.H., "Vegetation of the Great Smoky Mountains," EcoL 



Monographs, 26, 1-80 (1956). 



207. Whittaker, R.H., "Recent Evolution of Ecological Concepts in Relation to 



the Eastern Forests of North America," pp. 340-358 in "Fifty Years of Bot- 

 any," W. C. Steere, Ed., McGraw-Hill Book Co., New York, N.Y., 1958. 



208. Wiersum, L.K. and Bakema, K., "Competitive Adaptation of the Cation 



Exchange Capacity of Roots," Plant and Soil, 11, 287-292 (1959). 



209. Wildeman, E.De., "Actes des III Congres International de Botanigue," I, 



Gustav Fischer, Jena, 1910. 



210. Wolfenbarger, D.O., "Dispersion of Small Organisms. Incidence of Viruses 



and Pollen; Dispersion of Fungus Spores and Insects," Lloydia, 22, 1-106 

 (1959). 



211. Woods, F.W. and Shanks, R.E., "Natural Replacement of Chestnut by 



Other Species in the Great Smoky Mountains National Park," Ecology, 

 40,349-361 (1959). 



212. Wulff, E.V., "An Introduction to Historical Plant Geography," Chronica 



Botan. Co., Wahham, Mass., 1950. 



213. Youngner, V.B., "Growth of U-3 Bermudagrass Under Various Day and 



Night Temperatures and Light Intensities," Agron. Jour., 51, 557-559 

 (1959). 



I 



202 * Bifeliogiraphy 



