00315nam a2200109Ia 4500008004100000082002000041100001800061245004800079250000900127260003800136300003100174260313b        |||||||| |||| 00| 0 eng d  a519.28bM497.IE  aMegill, R. E.  aAn introduction to exploration economicsb/  a2nd.  aOklahoma:bPenn Well Books,c1979  axii, 180p. Index, Appendix