Brown L.R. Vital signs 1993 : The trends that are shaping our future / L.R.Brown,H.Kane,E.Ayres;Ed.L.Starke, 1993. - 150 p.
Brown L.R. Vital signs 1993 : The trends that are shaping our future / L.R.Brown,H.Kane,E.Ayres;Ed.L.Starke, 1993. - 150 p. - Текст : непосредственный.