Wilska, Seppo. <br/><br/>
Trace Elements in Finnish Ground and Mine Waters :   a Spectroanalytical Study 

 - Helsinki :   Suomalainen Tiedeakatemia,   1952. 
 - 76 p. ;   18 cm. 
 - Annales Academiae Scientiarum Fennicae ;   Chemica 46 .
<br/><br/> Series A. II. Chemica, 46