Hughes RM, Herlihy AT, Kaufmann PR.  2010.  An Evaluation of Qualitative Indexes of Physical Habitat Applied to Agricultural Streams in Ten U.S. States1. JAWRA Journal of the American Water Resources Association. 46(4):792-806.

OSU Authors: Hughes, Herlihy, Kauffman (courtesy)

Hughes RM, Kaufmann PR, Weber MH.  2011.  National and regional comparisons between Strahler order and stream size. Journal of the North American Benthological Society. 30(1):103-121.

OSU Authors: Hughes