Ballard, C. W.  1887- <br/><br/>
The elements of vegetable histology / 
by C. W. Ballard 
 - 2nd rev. and enl. ed. 
 - New York :  John Wiley,  1927 
 - xviii, 289 p. :  ill. ;  21 cm. 
<br/><br/> Reference books": p. 273 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant anatomy