Stubsgaard, Finn. <br/><br/>
Climbing into the crown directory, 4 :   a light weight catapult / 
Finn Stubsgaard. 
 - Humlebaek :   Danida Forest Seed Centre,   1987. 
 - 4 p. :   ill. ;   30 cm. 
 - Technical note ;   no. 31 .
<br/><br/><label>Subjects--Topical Terms: </label><br/> Forest management.
<br/><br/><label>Dewey Class. No.: </label>634.9 STU