TY  - BOOK
AU  - Friis Robert H.
AU  - Sellers Thomas A.
TI  - Epidemiology for Public Health Practice   
SN  - 9781284175431
AV  - RA651.F686 2021 
PY  - 2021///
CY  - United States of America 
PB  - Jones &Bartlett Learning 
N1  - includes index; includes Bibliographical references; Chapter 1. History and scope of Epidemiology 
              2.Practical applications of epidemiology 
              3.Measures of morbidity used in Epidemiology 
              4.Descriptive Epidemiology : person ,place and time
              5.Sources of data for use in Epidemiology 
              6. Study designs : Ecologic , Cross -sectional , Case -control
UR  - Uniform Resource Identifier 
ER  -