Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Okuda Ikuo,A Study on the Conservation Policy of the Tongass National Forest in Alaska during the 1990s: Analyses of the Tongass Timber Reform Act of 1990 and the Tongass Forest Plan of 1997 ,Journal of Rural Problems,0388-8525,The Association for Regional Agricultural and Forestry Economics,2011,47,1,35-40,https://cir.nii.ac.jp/crid/1390001204489855744,https://doi.org/10.7310/arfe.47.35