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1by s. d., Cowan, Richard S., Cuatrecasas, Jose, Singer, Rolf, Lowy, Bernard, Berg, C. C., Maas P. J. M., Prance, Ghillean T., Freitas da Silva, Marlene, Appan, S. G., Rogers, David J., Smith, Lyman B., Downs, Robert Jack, Morley, Thomas, Farr, Marie L., Lleras, Eduardo, Johnston, Marshall C., Johnston, La Verne A., Sleumer, H. O., Mori, Scott A., Hansen, Bertel, Buritica, Pablo, Hennen, Joe F., Gentry, Alwyn H., Mesa, Aldo, Poppendieck, Hans Helmut, Pennington, Terence D., Landrum, Leslie R., Gates, Bronwen, Kubitzki, Klaus, Renner, Susanne, Kaastra, Roel C., Daniel, Thomas F., Luteyn, James L., Forero, Enrique, Paden, John W., King Rogers, GeorgeTexto bibliotecaUNAM