Microenvironments in haemopoietic and lymphoid differentiation -- Contents -- Introduction: signals, receptors and repertoire in haemopoietic differentiation -- Haemopoiesis in mammalian bone marrow -- Discussion -- Self-renewing haemopoietic progenitor cells and the factors controlling proliferation and differentiation -- Discussion -- Haemopoietic microenvironments in vitro: ultrastructural aspects -- Discussion -- Regulation and localization of lymphocyte production in the bone marrow -- Discussion -- Environmental factors in haemopoietic failure in humans -- Discussion -- Mapping cell surface antigen expression on haemopoietic progenitor cells using monoclonal antibodies -- Discussion -- Lymphoid differentiation in vitro -- Discussion -- Microanatomy of the thymus: its relationship to T cell differentiation -- Discussion -- Expression and function of major histocompatibility complex antigens in the developing thymus: studies on normal and nude mice -- Discussion -- The human thymic microenvironment -- Discussion -- Cellular and molecular signals in T cell differentiation -- Discussion -- General discussion: tolerance and diversification of the T cell repertoire -- Histophysiology of follicular structures and germinal centres in relation to B cell differentiation -- Discussion -- The role of germinal centres in the generation of immunological memory -- Discussion -- Antigen-presenting cells, including Langerhans cells, veiled cells and interdigitating cells -- Discussion -- Differentiation of function among antigen-presenting cells -- Discussion -- Final general discussion T cell subsets and T cell function -- Decision-making in development -- Chairman's summing-up -- Index of contributors -- Subject index.