[Primary health care in urban and rural zones of developing countries: similarities and differences].
D003906:Developing Countries; D006262:Health; D006301:Health Services Needs and Demand; D011320:Primary Health Care; D012423:Rural Health; D012959:Socioeconomic Factors; D014504:Urban Health
Atención primaria de salud en zonas urbanas y rurales de los países en desarrollo: semejanzas y diferencias.