Tengo el agrado de presentar un número monográfico producto del trabajo colaborativo del grupo Co-Educa, integrado por especialistas de las áreas de Psicología y de Medicina. En él se reportan ocho escritos que dan cuenta de reflexiones conceptuales y metodológicas,…

Ten species of algae were collected from the Mexico City atmosphere, among them two species not previously reported: Botryokorine simplex and Chlorogloea microcystoides. 65% of the samples taken from July to August 1982 and July to December 1985, were positive.…