Hall, Wilfrid John. <br/><br/>
The Hibiscus mealy bug (Phenacoccus hirsutus, Green), 
by W.J. Hall ... 
 - Cairo,  Government Press,  1921. 
 - 1 p. l., 28 p., 1 l.  front. (fold. map) VI pl.  27 cm. 
<br/><br/><label>LCCN: </label>agr23000105  
<br/><br/><label>LC Class. No.: </label>S341  / .A4 no. 17