Farmer, R. D. T. 
Epidemiology and public health medicine /   Lecture notes [on] epidemiology and public health medicine.  Lecture notes epidemiology and public health medicine.  Richard Farmer, Ross Lawrenson.   - 5th ed.   - Oxford :  Blackwell,  2004.   - viii, 191 p. :  ill. ;  25 cm.   - Lecture notes (Blackwell Publishing Ltd.) .