[Health education in the school environment. I. Absenteeism in 2 primary schools of the Federal District].
D000041:Absenteeism; D002648:Child; D002662:Child Health Services; D004812:Epidemiologic Methods; D006266:Health Education; D006801:Humans; D008800:Mexico; D009017:Morbidity; D012574:Schools; D012959:Socioeconomic Factors
Estudios de educación para la salud en el ámbito escolar. I. Ausentismo en 1,010 escolares y sus causas. Estudio en dos escuelas primarias del Distrito Federal.