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By Urzúa Vergara, José Domingo, .
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70 p.

By Urzúa Vergara, José Domingo, .
Esquel : CIEFAP, 1991 .
102 p.

By González Valenzuela, Susana, .
Santiago : Universidad de Concepción, 1991 .
70 p. 9562270377

By Gallo, Leonardo.
Göttingen : Universität Göttingen, 1991 .
247 p.

By Wickel, Andreas.
Freiburg : Universität zu Freiburg, 1991 .
viii, 126 p. , Contiene Anexo

By Hartwig Carte, Fernando.
Santiago de Chile : Los Andes, 1991 .
185 p.

Roma : FAO, 1991 .
xix, 502 p. 925302291