Future growth of large cities as related to the potential of subsurface use; Barker. M.;Underground transport in urban areas: advantages and future prospects; Lupiac. L.;Underground systems for public utilities; Isgaard. E.;ubsurface construction and maintenance techniques in cities; specific problems and techniques in soft groundv; Lohuizen. H. P. S. van;Legal aspects of using subterranean space; Thomas. W. A.;Multiple use os civil defence installations; economic, political and practical aspects; Ohman. G.;Warehousing concepts; Haganas. K.;The legislatorīs role in developing the underground space resource; Moe. R. D.;Energy management, geology and underground space; Walton. M.;Underground storage of oil and gas products; Ignatius. Y.;Obstacles to subsurfarce storage of oil; experience of problems and obstacles to subsurface storage encountered in various countries; Jansson. G.;The Kansas City underground experience; Woodard. D. R.;Possibilities for archives and other safe storage underground; Ryan. V. J.;Energy technology in subsurface space; Gerholm. T. R.;Building systems and possibilities for energy conservation by extended use of subsurface space; Millhone. J. P.;District heating; production, storage and distribution of heat underground. An economical method of better utilization of energy available and protection of the environment; Koseklainem. L.;Utilization of the underground for solar and waste heat storage; Lindblom. U.;Nuclear power plants underground; Lindbo. T.