Parsons, Polly E. <br/><br/>
Pulmonary/ Respiratory Therapy Secrets/ 
Polly E. Parsons & John E. Heffner 
 - 2nd ed. 
 - Philadelphia   Hanley & Belfus  2002 
 - xix. 539p.  ill.  23cm 
<br/><br/> includes index 
<br/><br/><label>ISBN: </label>1560534273 
<br/><br/><label>LC Class. No.: </label>RC756  / .P84