534,981 CERVEN ERIK Demonstration and characterization of ecto-sialyltransferase in surface membranes of intact Ehrlich ascites tumour cells. Uppsala 1979 Almqvist and Wiksall 8° s. 57, il. + wkł. s. nlb. 2 Acta Universitatis Upsaliensis Abstracts of Uppsala Dissertations ... Faculty of Medicine 341 Doctoral dissertation