Introduction - co-ordination chemistry and its multifacets, B.V. Agarwala and K.N. Munshi; co-ordination chemistry of environment, D.F. Martin; retrospective studies on metal complexes as synthetic dioxygen carriers of biological interest, F. Basolo; heterometal alkoxides - a novel series of stable polymetallic co-ordination compounds, R.C. Mehrotra; solvent effects on the reactions of co-ordination complexes, A.C. Dash et al; a simple method for fitting properties of binary mixture, E. Hogfeldt; donor-acceptor interactions and structural flexibility of co-ordination compounds in solution, W. Linert; NMR spectroscopy of oriented systems - application to weak molecular complexes, C.L. Khetrapal; cyclic voltammetry, R.C. Kapoor; chelating polymers, C.-Y. Liu and K.L. Cheng; optical resolution of metal complexes by column-chromatography, M. Fujita and Y. Yoshikawa; correlation between the composition and structure of transition metal complexes and their Rf values obtained by planar chromatography, G. Vuckovic et al; some designs of polyethers for use in membranes of ion-selective electrodes, J.D.R. Thomas; copper proteins and their various roles in biological systems, P.K. Bhattacharya; urinary stones, diet and folk medicine, A.K. Banerjee et al.