Ericson, Borje. <br/><br/>
Studies of the genetical wood density variation in scots pine and No rway spruce / 
Borje Ericson. 
 - Stockholm :   SSI,   1960. 
 - 52 p. :   ill. ;   29 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Wood-- Density.<br/> Scots pine.<br/> Norway spruce.
<br/><br/><label>Dewey Class. No.: </label>634.9 ERI