THOMAS Pat <br/><br/>
Why is it so hard to breathe?:  a first look at asthma/ 
Pat Thomas 
 - New York, Hauppauge :  Barron's Educational Series, Inc,  2008 
 - 29 p. 
 - A first look at...book .
<br/><br/><label>ISBN: </label>9780764138980 (pbk) :  14.90 BND