00511cas a22001937a 450000500170000000800410001701000100005801100100006803500100007824500190008826000600010730000070016731000120017436200220018665000400020886600160024886600260026486600270029020220329142322.0000620u        us mr pernn   0   b1eng d  a81621  a82593  a9309200aColombia Today0 aBogota, Colombia :bColombian Information Service,c19-  av.  aMensual  av.28 n.esp., 199414aCaféxPublicaciones periódicas.  an.28 (1994)  av.25 n.8,10-12 (1991)  av.26 n.1-2,7-11 (1992)