Environmental indicators :  a preliminary set = Indicateurs dŽenvironnement : une etude pilote. 

 - Paris :  Washington, D.C. :  OECD ;  OECD Publications and Information Centre [distributor],  1991. 
 - 77 p. :  ill. ;  27 cm. 
<br/><br/> English and French. 
<br/><br/><label>LCCN: </label>91-176879 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental indicators.