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Published November 1988. Reprinted March 2009. Please check for up-to-date informatin in the OSU Extension Service Catalog: http://extension.oregonstate.edu/catalog
Published May 1992. Reprinted March 2009. Please check for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published October 2002. Please check for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog