Shigo, A.L.  <br/><br/>
Tree decay: an expanded concept  (Book) 

 - Washington, D.C.  United States Dept. of Agriculture  1979 
 - 72p.  25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trees, care of
<br/><br/><label>Universal Decimal Class. No.: </label>634.0.4 SHI  / 4053