Public Health Bulletin

Public Health Bulletin

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Summer anophelines are A. guadrza#39;maculatus; fall anophelines mostly A. cruciam. ... proved better to have a main ditch, preferably just inside and parallel to the dike, with parallel laterals spaced 200 to 400 feet apart, connected at aquot; upper ends by a seepage ditch following the foot of the hill, as shown in the above diagram.

Title:Public Health Bulletin
Publisher: - 1920

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