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Pruning General

Weakley, C. 1985.
Krueger, William H. and Zachary Heath. 2000.
Krueger, Bill. 1988.
Krueger, B., F. Niederholzer and E. Nielsen. 2006.
Krueger, B., F. Niederholzer, J. Nunes and E. Nielsen. 2007.
Krueger, B., F. Niederholzer, E. Nielsen and B. Mori. 2008.
Olson, Bill. 2007.
Niederholzer, Franz. 2004.
Weakley, Craig and Jim Yeager. 1986.
Southwick, S., T. DeJong and J. Yeager. 1987.
Southwick, S. M. and Craig Weakley. 1988.
Reil, Wilbur. 1993.
Reil, W., S. Southwick and J. Yeager. 1994.
Chaney, David H. 1983.
Fridley, R. B. and Ching Yang. 1970
Fichtner, Elizabeth. 2010.
Fichtner, E. 2011.