The challenge of implementation :  district health systems for primary health care / 
World Health Organization 
 - Geneva Switzerland ;  WHO,  1988 
 - 72 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Atención Primaria de Salud
<br/><br/><label>Dewey Class. No.: </label>362.1  / W927c