00492cam a2200181 i 45000010006000000050017000060080041000230400015000640410008000790500022000872450058001092600036001673000011002034400026002146500013002406500038002537000019002914905220230410132810.0071102b1977    ag a          000 0 spa    aDRFGDbspa0 aspa14aQH 541bD441 197703aEl desafio ecológico /cLewis Mumford ... [et al.].  aCaracas :bEl Cid Editor,c1977  a152 p. 0aCuadernos del CN ;v8 0aEcology. 0aPollutionxEnvironmental aspects.1 aMumford, Lewis