International environmental soft law :  collection of relevant instrumrnts / 
edited by W. E. Burhenne ; selected and compiled by Marlene Jahnke. 
 - Dordrecht :  Martinus Nijhoff,  1993. 
 - 1 v. (various pagings) ;  26 cm. 
<br/><br/>At head of title: International Council of Environmental Law. 
<br/><br/><label>ISBN: </label>0792320700 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental law, International.