Gerrard, John W <br/><br/>
Understanding allergies / 
by John W. Gerrard. 
 - Springfield, Ill. :  Thomas,  1973. 
 - 77 p. ;  23 cm. 
<br/><br/><label>ISBN: </label>0398027684 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Allergy