Published in Boletin De La Sociedad De Biologia De Concepcion, in 1993, in volume 64, pages 21-26

Published in Bol. Soc. Biol. Concepción, Chile, in 1993, in volume 64, pages 47-84

Published in Boletin de la Sociedad de Biologia de Concepcion, in 1993, in volume 64, pages 99-104

Published in Boletin De La Sociedad De Biologia De Concepcion, in 1993, in volume 64, pages 113-119

Published in Boletin De La Sociedad De Biologia De Concepcion, in 1993, in volume 64, pages 121-145

Published in Bol. Soc. Biol. Concepción, Chile, in 1993, in volume 64, pages 148-158

Published in Boletin De La Sociedad De Biologia De Concepcion, in 1993, in volume 64, pages 159-162

Published in Boletin De La Sociedad De Biologia De Concepcion, in 1993, in volume 64, pages 171-187

Published in Boletin de la Sociedad de Biologia de Concepcion, in 1993, in volume 64, pages 195-207