EXCERPTA MEDICA INTERNATIONAL CONGRESS SERIES no. 349 524.961 Proceedings XI International Cancer Congress Florence, 20-26 October 1974. Ed. Pietro Bucalossi, Umberto Veronesi, Natale Cascinelli. Amsterdam 1975 Excerpta Medica,American Elsevier 8° Vol. I.Cell biology and tumor immunology, s. IX, nlb. 1, 381 - ilustr. Excerpta Medica International Congress Series No. 349