URLDate
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(if any)		Access
Conditions		Notes
http://archive.lib.msu.edu/tic/msufd/article/20008.pdf 01/24/2013 PDF Reader
http://archive.lib.msu.edu/tic/mitgc/article/200195.pdf02/16/2017PDF ReaderProceedings of the 71st Annual Michigan Turfgrass Conference reprint