SIEWERT J.R. 302.448 NATIONAL 23rd National Cancer Congress of the German Cancer Society Berlin, 8-12 June 1998 : abstracts of lectures and posters / Special vol. eds. J.R. Siewert, U. Fink. - [New York] s Springer Verl., 1998. - [6], 202 s. ; 28 cm. - (Journal of Cancer Research and Clinical Oncology, ISSN 0171-5216 ; suppl.to vol.124)