Part 1 Normal haemophoiesis: introduction and general outline of haemopoiesis, O.D. Laerum; isolation and biological characterization of bone marrow stem cells and progenitor cells, J.W.M. Visser; characterization of erythroid, lymphoid and monomyeloid lineages in normal human bone marrow, M.R. Loken, et al; megakaryopoiesis - analysis and cell sorting, A. Nakeff; cell kinetics of hemooiesis, O.D. Laerum, et al. Part 2 Normal peripheral blood cells: reticulocytes and mature erythrocytes, H.J. Tanke; leucocyte differential counting, L.W.M.M. Terstappen and M. Loken; analysis of phagocytemicoorganism interactions, R. Bjerknes; measurements of Granulocyte oxidative metabolism, M. Seeds and D.A. Bass; analysis of platelets, K.A. Ault et al. Part 3 Pathologic conditions: bacterial and viral infections, R. Bjerknes; HIV-infection and AIDS, B. Ohlsson-Wilhelm and A. Landay; detection and analysis of parasitic infections, B. Mons and C.J. Janse; antibody defined surface molecules of normal and malignant haemopoietic cells, W. Knapp; biological characterization and therapy monitoring of leukaemia, M. Andreeff.