Billings, W. D., and William B. Drew. "Bark Factors Affecting the Distribution of Corticolous Bryophytic Communities." The American Midland Naturalist 20, no. 2 (1938): 302-330.

Drew, William B.. "Notes on Aster in Eastern Tennessee." Castanea: The Journal of the Southern Appalachian Botanical Club 2, no. 6 (1937): 75-81.

Billings, W. D., Stanley A. Cain, and William B. Drew. "Winter Key to the Trees of Eastern Tennessee." The Journal of the Southern Appalachian Botanical Club 2, no. 3 (1937): 29-44.