ON CALL:  principles and protocols/ 
by Shame A. Marshall, John Ruedy. 
 - 3rd ed. 
 - Philadelphia:  W.B. Saunders Company,   2000. 
 - xx, 478 p.:  ill.;  20 cm. 
<br/><br/><label>ISBN: </label>0721650791 
<br/><br/><label>LC Class. No.: </label>RC86.7   /  .G55 2000