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by D. Peter Snustad (University of Minnesota); Michael J. Simmons (Univ. of Minnesota)
by Robert J. Brooker
by Chung, Daniel C.; Haber, Daniel A.
by George Acquaah (Langston University)
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by Brooker, Robert
by Anholt, Robert; Mackay,trudy
by D. Peter Snustad (Univ. of Minnesota); Michael J. Simmons (Univ. of Minnesota)