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Very effective control of malaria has been achieved in towns of the Southern Territory of Lower California through DDT residual spraying of houses.
1 The studies and observations on which this paper is based were conducted under the auspices of the International Health Division of The Rockefeller Foundation with the cooperation of the Ministry of Health of Mexico and the government of the Southern Territory of Lower California. Slides were examined by Srta. E. Barrera and Sr. R. Pérez.
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