PROCEEDINGS 521,289 Proceedings of the German Society for Neurosurgery .Modern aspects of neuroiurgexy. Amsterdam 1973 Excerpta Medica 8° Ercerpta Medica,International Congress Series no. 287. Vol.3.I.Biomechanics in the pathogenesis. II.Astrocytomas of the cerebrum.III.The neurosurgical intensive care unit.IV.Varia. s, nlb.10, 288, ilustr.