Stephen D. Porter

Methods for collecting algal samples as part of the National Water-Quality Assessment Program

Stephen D. Porter, Thomas F. Cuffney, Martin E. Gurtz, 1993 .

Distribution of benthic algae in the upper Illinois River basin in relation to geology and land use

Stephen D. Porter, S. D. Porter, H. V. Leland, 2000 .

Responses of Physical, Chemical, and Biological Indicators of Water Quality to a Gradient of Agricultural Land Use in the Yakima River Basin, Washington

Thomas F. Cuffney, Stephen D. Porter, Martin E. Gurtz, 2000 .