00317nam a2200121Ia 4500008004100000100001600041245005400057260002900111300000900140650002400149942000700173999001500180190216s9999||||xx |||||||||||||| ||und||  aTrivedi R N 0aEnvironmental Problems Prospectus And Constraints  bAnmol Publicationsc1992  a225p  aChemistry-Chemistry  cBK  c2769d2769