Explaining variations in hospital death rates :  randomness, severitu of illiness, quality of care / 
Rolla Eward Park ... [et al.]; prepared for the Health Care Financing Administration, U.S. Department of Health and Human Services. 
 - California :  Rand Corporation,  1990 
 - 7 p. ;  28 cm. 
 - A Rand note ;  N-3196-HCFA .
 - Rand note ;  N-3196-HCFA. .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label> Hadiah