Surveys and Perspectives Integrating Environment and Society

Surv. Perspect. Integr. Environ. Soc., 1, 39-49, 2008
www.surv-perspect-integr-environ-soc.net/1/39/2008/
doi:10.5194/sapiens-1-39-2008
© Author(s) 2008. This work is distributed
under the Creative Commons Attribution 3.0 License.