@article {89,
	title = {Checklist of algal taxa from Ohio{\textquoteright}s unglaciated Western Allegheny Plateau exclusive of the Ohio River},
	journal = {Ohio Biological Survey Miscellaneous Contribution No. 11},
	year = {2006},
	author = {Verb, R.G. and Bixby, R.J. and Casamatta, D.A. and Chiasson, W.B. and Filkin, N.R. and Hall, M.M. and Hamsher, S.E. and Taylor, D.A. and Vis, M. L.}
}
@article {97,
	title = {Analysis of acid mine drainage impacted streams using a periphyton index},
	journal = {Journal of Freshwater Ecology},
	volume = {19},
	year = {2004},
	chapter = {313-324},
	author = {Hamsher, S.E. and Verb, R.G. and Vis, M. L.}
}
