Vital signs 1993. The trends that are shaping our future Corporate author Brown, L.R., Kane, H., Ayres, E. Date 1993 Source IUCN (ID: MON-052881) Publisher | Place of publication W.W. Norton & Company | New York, USA ISBN 0-393-31024-8 Pages 150 p. Language English Field of application International Subject Environment gen. Keyword Comprehensive description