Pirone, Pascal Pompey,  1907- <br/><br/>
Tree maintenance / 
P. P. Pirone. 
 - 5th ed. 
 - New York :  Oxford University Press,  1978. 
 - xviii, 587 p. :  ill. 
<br/><br/><label>ISBN: </label>0195023218 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ornamental trees--Diseases and pests.<br/>Trees, Care of.