1971 / 1-2. szám In memoriam Josif Abramovitch Kassirsky Lapis, K. - Schuler, D.: Effect of tetra-o-methyl-sulphonyl-D-mannitol (R-52) on the ultrastructure of lymphoid cells in tissue culture Malec, J. - Wojnarowska, M. - Kornacka, L.: Nuclear RNA of normal and leukaemic human leucocytes Teitel, P. - Szász, I.: A haemorheological view on molecular interactions between red blood cell constituents Brabec, V. - Šebestík, V.: Sequestration von wärmealterierten Erythrocyten bei normalen und "hypersplenischen" Ratten Janele, J. - Hníková, O. - Brychnáč, V.: Megaloblastic anaemia in children due to isolated vitamin B12 malabsorption Louwagie, A. C. - Waes, J. A. - Van Vuchelen, J. - Verwilghen, R. L.: Bon...