Frenk J. [et al.] <br/><br/>
State intervention in medical care: types, trends and variables /  (Artículo) 
Julio Frenk, Avedis Donabedian 
<br/><br/> En: Health Policy Plan -- 1987 Mar;2(1):17-31 
<br/><br/><label>Dewey Class. No.: </label>A0073