TY - BOOK AU - Frederick, Kenneth D. AU - Sedjo, Roger A. TI - America's renewable resources : historical trends and current challenges PB - Resources for the Future PY - 1991 EP - xiv, 296 p. UR - http://ci.nii.ac.jp/ncid/BA13190332 SN - 0915707608 SN - 0915707616 ER -