CELL 194,540 Cell impairment in aging and development. Proceeding of a symposium on Impairment of Cellular Functions Diring Aging and Development in Vivo and in Vitro held at the Castle of Hruba Skala in Czechoslovakia-May 5-9,1974.Ed. by Vincent J.Cristofalo and Emma Holeckova. New York 1975 Plenum Press 4° s. XV. nlb. 1. 557, il. Advances in Experimental Medicine and Biology vol. 53