Ecology of the subarctic regions :  proceedings of the Helsinki symposium =  Ecologie des regions subarctiques : actes du colloque d' Helsinki 
 Ecologie des regions subarctiques :  actes du colloque d' Helsinki 

 - Paris :  Unesco,  1970 
 - 364 p. :  ill. ;  25 cm. 
<br/><br/> Symposium organized by the government of Finland and Unesco in co-operation with the International Geographical Union and held in Otaniemi (near Helsinki) from 25 July to 3 August 1966 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology--Congresses--Arctic regions