Orgeon,s forest resources : their contribution in the state's economy Research Bulletin 23, September 1978 著者: Brodie, J.Douglas

その他の著者: “…McMahon, Robert O. ; Gavelis, William H.…”

Oregons forest resources : their contribution in the states economy 著者: Brodie, J. Douglas

その他の著者: “…Gavelis, William H.…”