Following the path to sustainable development : framework and indicators for sustainable development Costa Rica, Bhutan, Benin, The Netherlands : progress report 1, april-december...

por Van Schaik, H.P.J., Van Schaik, H.P.J., Van Vuuren, Detlef, De Kruijf, Hans A.M.
Publicado 1997

Tropical ecological systems : trends in terrestrial and aquatic research /

por Bernhard Reversat, France
Publicado 1975