2 results filtered with: Covington, Platt W. (Platt Walker), 1884-
- Books
Health departments of states and provinces of the United States and Canada / compilation by John A. Ferrell ... Wilson G. Smillie ... Platt W. Covington ... Pauline A. Mead ... International Health Division of the Rockefeller Foundation for the Conference of State and Provincial Health Authorities of North America. Prepared by direction of the Surgeon General.
Ferrell, John A. (John Atkinson), 1880-1965.Date: 1932- Books
Health departments of states and provinces of the United States and Canada / compilation by John A. Ferrell, Wilson G. Smillie, Platt W. Covington, Pauline A. Mead, International Health Division of the Rockefeller Foundation for the Conference of State and Provincial Health Authorities of North America ; prepared by direction of the Surgeon General.
Ferrell, John A. (John Atkinson), 1880-1965Date: 1929