At head of title: Department of commerce. Bureau of the census. Sam L. Rogers, director.

The Council of national defense began this work but was unable to complete it because of other pressing problems. cf. "Letter of transmittal." p. 4.

Prepared under the direct supervision of William H. Davis, M. D., chief statistician for vital statistics, and Richard C. Lappin, expert special agent, after consultation with the Advisory committee on medical nomenclature. cf. "Letter of transmittal," p. 4.

Microfilmed for preservation