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The Spruce and Balsam Fir Trees of the Rocky Mountain Region

Albrecht EichhornAlexander WetmoreArthur W. Jobbins-PomeroyB. R. CoadCarl S. ScofieldDon Hurdman BarkEdwin Chesley Estes LordErnest Augustus BoegerFrank Herbert JacksonFrank RabakFrederick Vernon CovilleFurman Bryant WiseGeorge Bishop SudworthGeorge Charles HusmannH. J. RamseyHarry Percy BarrowsHerbert Hager MowryRalph Chafee MillerRobert Harris HutchisonSamuel Henry AyersThomas Elliott SnyderThomas Ray StantonWilliam Bradford AlwoodWilliam Jasper SpillmanArthur Williams BroomellEmanuel Alexandrovich GoldenweiserHarrison Morton DixonGeorge Austin Billings

出版	U.S. Department of Agriculture, 1916
URL	http://books.google.com.hk/books?id=PrMUAAAAYAAJ&hl=&source=gbs_api