Ecology of the subarctic regions :  proceedings of the Helsinki symposium. 

 - Paris :  UNESCO,  c 1970. 
 - 364 p. :  ill. ;  27 cm. 
 - Ecology and Conservation. .
<br/><br/>346  346 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology -- Sub-arctic.
<br/><br/><label>Dewey Class. No.: </label>634.94 / U3e