Napaporn Jiraphongsa. 1992. Maternal perception and socioeconomic factors associated with severity of acute respiratory infection in children aged under five years. Faculty of Graduate Studies, Mahidol University;

Napaporn Jiraphongsa. Maternal perception and socioeconomic factors associated with severity of acute respiratory infection in children aged under five years. . Bangkok:Mahidol University, 1992.

Napaporn Jiraphongsa. (1992) Maternal perception and socioeconomic factors associated with severity of acute respiratory infection in children aged under five years . Mahidol University/Bangkok.