Plant species diversity and occurrence in young, mature and old-growth Douglas-fir stands in western Oregon and Washington. Spies, T. A. In Ruggiero, K. B. & Andrew B.;Huff, M. H., editors, Wildlife and vegetation of unmanaged Douglas-fir forests, volume 285. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, Portland, OR, 1991.
Plant species diversity and occurrence in young, mature and old-growth Douglas-fir stands in western Oregon and Washington [link]Paper  bibtex   
@incollection{spies_plant_1991,
	address = {Portland, OR},
	title = {Plant species diversity and occurrence in young, mature and old-growth {Douglas}-fir stands in western {Oregon} and {Washington}},
	volume = {285},
	url = {http://www.fs.fed.us/pnw/pubs/gtr285/index.htm},
	booktitle = {Wildlife and vegetation of unmanaged {Douglas}-fir forests},
	publisher = {U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station},
	author = {Spies, Thomas A.},
	editor = {Ruggiero, Keith B.;Carey, Andrew B.;Huff, Mark H., Leonard F.;Aubry},
	year = {1991},
	keywords = {AND, forest ecosystems}
}

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