Introduction. Cell communication in embryological development : the role of distal and proximal signals / William J. Rutter -- Growth factors. Biological and molecular studies of the mitogenic effects of human epidermal growth factor / Graham Carpenter and Stanley Cohen -- Cellular specificities of fibroblast growth factor and epidermal growth factor / Denis Gospodarowicz, John S. Moran, and Anthony L. Mescher -- Growth control by serum factors and hormones in mammalian cells in culture / Dieter Paul [and others] -- Factors affecting nerve cell differentiation and function. Nerve growth factor : studies on the localization, regulation, and mechanism of its biosynthesis / Edward A. Berger and Eric M. Shooter -- Nerve growth factor as a mediator of information between effector organs and innervating neurons / H. Thoenen, M. Schwab, and U. Otten -- Peptides as central nervous system neurotransmitters / Solomon H. Snyder.

Cell interactions in blood cell development. Factors affecting the differentiation of blood cells / J.E. Till [and others] -- Factors controlling the proliferation of haemopoietic stem cells in vitro / T.M. Dexter, T.D. Allen, and L.G. Lajtha -- Aspects of erythroid differentiation and proliferation / John W. Adamson and James E. Brown -- The role of factors in differentiation of non-erythroid cells / Malcolm A.S. Moore -- Cell interactions in the immune system. Cell interactions in cell mediated immunity / Michael Feldman -- Lymphocyte differentiations induced by thymopoietin, bursopoietin, and ubiquitin / Gideon Goldstein -- Cell interactions in organogenesis. An analysis of pancreatic development : role of mesenchymal factor and other extracellular factors / William J. Rutter [and others] -- Factors effecting differentiation in lower eukaryotes. Action of a morphogenetic substance from hydra / H. Chica Schaller -- Mating-type specific pheromones as mediators of sexual conjugation in yeast / Vivian L. MacKay.