Knudsen, Jens W. <br/><br/>
Biological techniques : collecting, preserving and illustrating plants and animals 
Jens W. Knudsen 
 - New York  Harper and Row  1966 
 - xi, 525p.: ill. ; 23cm. 
<br/><br/><label>Dewey Class. No.: </label>579.6  / KNU