Roberts, Doris E. The staffing of public health and outpatient nursing services : methods of study / Doris E. Roberts. - Geneva : World Health Organization, 1963. - 101 p. : ill. ; 21 cm. - Public health papers, 21. . Includes bibliography. 318 318 Subjects--Topical Terms: Education, nursing, related topics. Dewey Class. No.: 610.734 / R541s