00370nam a2200133 a 450000500170000002000180001708200160003510000190005124500570007025000130012726000490014030000260018970000210021520251203111049.0  a9780071101950  a333.72bENG  aEnger, Eldon D  aEnvironmental scienceba Study of Interrelationships  a11th ed.  aNew YorkbMcGraw Hill Higher Educationc2008  axxiv,488p.c26cm.cPB  aSmith, Bradley F