"usfs-gtr-nrs-27" . "Family forest owners of the United States, 2006. A Technical Document Supporting the Forest Service 2010 RPA Assessment. Gen. Tech. Rep. NRS-27"^^ . "2008"^^ . "http://www.treesearch.fs.fed.us/pubs/15758"^^ . "report" . . . . . . . . . _:genid1 . _:genid1 . _:genid1 . _:genid1 . _:genid1 . _:genid2 . _:genid2 . _:genid2 . _:genid2 .