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by David Halliday (University of Pittsburgh); Robert Resnick (Rensselaer Polytechnic Institute); Jearl Walker (Cleveland State University)
by Richard Riegelman; Brenda Kirkwood, University at Albany, State University of New York
by Cornelis Klein (The Univ. of New Mexico); Barbara Dutrow (Louisiana State University )
by Florida Natural Areas Inventory, Institute of Science & Public Affairs, Florida State University
by Daniel W. Halpin (Purdue University ); Bolivar A. Senior (Colorado State University )
by Brooks, F. Erik
by Thomas V. Cech (Colorado State University)
by John R. Schermerhorn (Ohio University); James G. Hunt; Richard N. Osborn (Wayne State University); et al.
by Donald F. Young (Iowa State University); Bruce R. Munson (Iowa State University); Theodore H. Okiishi (Iowa State University); et al.
by Douglas C. Montgomery (Georgia Institute of Technology); George C. Runger (Rensselaer Polytechnic Institute); Norma F. Hubele (Arizona State University )
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