na INLIS000000000091549 eng 0010-0118006504 Natural Resource and Environmental Economics Roger Perman [et al ] Roger Perman [et al ]. s.l. : Pearson Education, 2003 xxv,700p.:bibl.:illus.:ind 25 cm 0-273-65559-0 333.7 Rog n 333.7 Environmental Economics 0405100251