Some peculiarities of hydrography and water masses of the Indian Ocean / G.N. Ivanov-Frantskevich. Circulation of waters in the northern Indian Ocean during the winter monsoon / I.M. Ovchinnikov. Dynamic method as applied to the equatorial Indian Ocean / Yu.A.Romanov. Distribution of water temperature in the northern Indian Ocean / V.V. Lukyanov. Optical properties of the main water masses in the northern Indian Ocean / V.M. Pavlov. Some peculiarities of hydrochemistry in the northern Indian Ocean / V.V. Mokiyevskaya. Factors conditioning the oxygen minimum in the subsurface waters of the Arabian Sea / V.G. Neyman. Certain peculiarities of the plankton biomass distribution in the surface waters of the Indian Ocean in winter 1959/1960 / V.G. Bogorov. Primary production and nutrients in the Indian Ocean / Yu.G. Kabanova. Investigation of sediments in the northern Indian Ocean / P.L.Bezroukov. On chemistry of sediments in the Indian Ocean / O.K.Borodovskiy. Multichannel acoustic network for seismoacoustic measurements in the ocean / V.M. Kovylin.