Journal Article AuthorD. Fox, A.M. Bartuska, J.G. Byrne, E. Cowling, R. Fisher, Gene Likens, S.E. Lindberg, R.A. Linthurst, J. Messer, D.S. NicholsYear of Publication 1989 Journal USDA For. Serv. Gen. Tech. Rep. RM-168. Pages 36 DOI Google Scholar