Preston, John <br/><br/>
The geology of the pre-cambrian rocks of the kuopio district 

 - Helsinki :   Suomalainen Tiedeakatemia,   1954. 
 - 111 p. :   map. ;   18 cm. 
 - Annales Academiae Scientiarum Fennicae. Serie A. III. Geologica-Geographica ;   40 .
<br/><br/> III - Geologica - geographica