Mullin, R.E.  <br/><br/>
Experiments with root and top pruning of white spruce nursery stock  (Book) 

 - Ontario, Canada  Ontario Department of Lands and Forests  1957 
 - 31p.  23 cm. 
<br/><br/><label>Universal Decimal Class. No.: </label>542.12 MUL  / 3541