01281cas a2200385 a 4500008348708MiAaHDL20100614000000.0m d cr bn ---auaua890111u1984uuuucr fx p 0 b0spa dsf 93090893 sn 8902503189011011-0275sdr-ucsd.b25168915(OCoLC)19006183Facultad de Ciencias Exactas y Naturales, Universidad Nacional, Apartado 86, Heredia, Costa RicaHULHULNSTDLCSYSOCLCQUtOrBLWlcdWMLC 93/14UnicienciaUnicienciaUnicienciaHeredia, Costa Rica :Editorial de la Universidad Nacional,[1984-v. :ill. ;25 cmSemiannualVol. 1, no. 1 (jul.-dic. 1984)-Mode of access: Internet.SciencePeriodicalsUniversidad Nacional (Costa Rica).Facultad de Ciencias Exactas y Naturales00834870820090401182427.020100614000000.020120815114034.02024-05-04T17:45:35ZSDR-UCSDIII - MILLENIUMloader.pl-001-001SEsdr-ucsd.b25168915uc1SDRUCSDuc1.31822009754375UCv.1 no.1.b25168915UCUCSD20240504googleuc1.31822009754375v.1 no.1undbibnon-US bib date2 >= 1931UCUCSD20240613googleuc1.31822009754383v.2 no.1undbibnon-US bib date2 >= 1931UCUCSD20240504googleuc1.31822009754417v.3 no.1-2undbibnon-US bib date2 >= 1931