TY - BOOK AU - Herfindahl, Orris C. (Orris Clemens) TI - Three studies in minerals economics PB - AMS Press PY - 1983 T2 - Resources for the Future (Series) EP - iv, 63 p. UR - http://ci.nii.ac.jp/ncid/BA01415708 SN - 0404603351 ER -