Ochsner, Peter. <br/><br/>
Climbing within the crown 2 :  tree climbing using the prussik kno t / 
Peter Ochsner. 
 - Humlebaek :  Danida Forest Seed Centre,  1984. 
 - 4 p. :  ill. ;  30 cm. 
 - technical note ;   no. 11 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tree climbing.
<br/><br/><label>Dewey Class. No.: </label>634.9 OCH