00997cam a2200265 a 450000100040000000500170000400600040002100700040002500800040002901000170003302000220005004000190007205000210009108200180011224501970013026001060032730000340043344000560046750400410052365000290056465000240059365000310061770000150064871000680066300020170726155056.0000000000  a   89030763   a0444873619 (U.S.)  aUOELcDLCdDLC00aTD193b.E24 198900a574.5/22221900aEcological assessment of environmental degradation, pollution, and recovery :blectures of a course held at the Joint Research Centre, Ispra (Italy), 12-16 October 1987 /cedited by O. Ravera.  aAmsterdam ;aNew York :bPublished for the Commission of the European Communities by Elsevier,c1989.  axiv, 369 p. :bill. ;c25 cm. 0aIspra courses on chemical and environmental science  aIncludes bibliographical references. 0aEnvironmental chemistry. 0aBiotic communities. 0aEnvironmental degradation.1 aRavera, O.2 aCommission of the European Communities.bJoint Research Centre.