Friis Robert H. <br/><br/>
Epidemiology for public health practice :   student study guide 
/ Robert H. Friis 
 - 4th ed. 
 - Sudbury :   Jones and Bartlett Publishers,   c2011. 
 - 80 p. :   Ill. ;  24 cm. 
<br/><br/><br/>eng. 
<br/><br/><label>ISBN: </label>9781449612573  TZS 20,000/= 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epidemiology<br/>public health<br/>Problems and exercises
<br/><br/><label>Dewey Class. No.: </label>614.4 FRI