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This report of the Committee of the Medical Congress of San Salvador contains an excellent discussion of the various causes of infant mortality. The numerous charts and diagrams should be studied in detail.
Ensayo de investigacion de la mortalidad infantil en san salvador y algunas sugerencias para combatirla.. Am J Dis Child. 1939;58(2):449. doi:10.1001/archpedi.1939.01990080225030