@inproceedings{warren_williamson_sills_2002, title={Minority landholders and working forests in the south}, booktitle={Proceedings of the Society of American Foresters Convention}, author={Warren, S. and Williamson, R. and Sills, E.}, year={2002} }
 @article{williamson_gray_1973, title={Effect of water table depth on yield of cabbage, squash, and tendergreen}, volume={98}, number={2}, journal={Journal of the American Society for Horticultural Science}, author={Williamson, R. E. and Gray, T. N.}, year={1973}, pages={207} }
 @article{williamson_kriz_1970, title={Response of agricultural crops to flooding, depth-of-water-table and soil gaseous composition}, volume={13}, number={2}, journal={Transactions of the ASAE}, author={Williamson, R. E. and Kriz, G. J.}, year={1970}, pages={216} }