R.C. Simmons
Simmons, R.C., Arthur J. Gold, and Peter M. Groffman. 1992. “Nitrate Dynamics In Riparian Forests: Groundwater Studies”. J. Environ. Qual. 21: 656-665.
Groffman, Peter M., Arthur J. Gold, and R.C. Simmons. 1992. “Nitrate Dynamics In Riparian Forests: Microbial Studies”. J. Environ. Qual. 21: 666-671.