The Incidence of Illness in a General Population Group: General Results of a Morbidity Study from December 1, 1921, through March 31, 1924, in Hagerstown, Md.

Edgar Sydenstricker, The Incidence of Illness in a General Population Group: General Results of a Morbidity Study from December 1, 1921, through March 31, 1924, in Hagerstown, Md., Public Health Reports (1896-1970), Vol. 40, No. 7 (Feb. 13, 1925), pp. 279-291