Section headings and selected papers: General Characteristics of Step Polymerization. Polycondensation and related reactions, F Parodi & S Russo. General aspects, P Manaresi & A Munari. Factors affecting rate of polymerization, A Munari & P Manaresi. Formation of cyclic oligomers, G Montaudo & P Maravigna. Ring-chain equilibria, U W Suter. Constitutional regularity in linear condensation polymers, F T Gentile & U W Suter. Multifunctional step polymerization, T A Vilgis. Experimental methods of solution polymerization, V V Korshak & V A Vasnev. Condensation polymerization in non-aqueous dispersions, D J Walbridge. Solid-state polymerization, F Pilati. Cyclobutane polymers by topochemical photopolymerization, M Hasegawa. Topochemical polymerization: diynes, D Bloor. Synthesis by Step Polymerization. Polyesters, F Pilati. Polyarylates, B D Dean et al. Unsaturated polyesters, A Fradet. Aromatic polyamides, L Vollbracht. Isocyanate-derived polymers, F Parodi. Polyurethanes, K C Frisch & D Klempner. Polyureas, A J Ryan & J L Stanford. Polybenzyls, C P Tsonis. Poly(ether ketones)s, P A Staniland. Polysulfides, D E Vietti. Poly(phenylene sulfide)s, J F Geibel & R W Campbell. Polysulfones, F Parodi. Polysiloxanes, J J Lebrun & H Porte. Phenol-formaldehyde polymers, A Knop et al. Urea-formaldehyde and melamine-formaldehyde polymers, D Braun & H-J Ritzert. Epoxy resins, K A Hodd. Polymers with main-chain mesogenic units, E Chiellini. Polymers with side-chain mesogenic units, R Zentel. Subject index.