Hubungan karakteristik sosial ekonomi, pengetahuan, sikap dan kepercayaan ibu dengan perilaku penggunaan pelayanan kesehatan bagi balita sakit ISPA : studi di Kabupaten Indramayu, tahun 1995 = The relationship between characteristic social economic, knowledge. attitude and beliefs of mothers and the use of health services for children under five years of age suffering from acute respiratory infection, Study in Indramayu, 1995