Biosfeer & mens. 
 Biosfeer en mens 

 - 197 p.  ill. 
<br/><br/><label>ISBN: </label>90-220-0318-3  paperback 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology--Congresses<br/>Nature--Effect of human beings on--Congresses<br/>ZV Ecology
<br/><br/><label>Index Terms--Genre/Form: </label>--Conferences - Meetings