00530nam a2200205Ia 450000500170000000800410001702000140005804000190007204100120009108200150010310000170011824500500013525000110018526000320019630000120022850400400024065000220028065100120030285000100031420230601112221.0131103s9999    xx            000 0 und d  a713163283  aLoreto College  aEnglish  a333.7bSIM  aSimmons,I.G. 4aThe ecology of natural resourcescI.G.Simmons  a2nd ed  aLondonbEdward Arnoldc1981  ax,375p   aIncludes bibliographical references  aNatural resources  aEcology  aLCLIB