کتاب های Friis, Robert H.
![Epidemiology 101](http://cdn.ketabkoo.com/covers/3/353995-n.jpg)
Epidemiology 101
Robert H. Friis, 2009![Essentials of Environmental Health](http://cdn.ketabkoo.com/covers/10/1068020-n.jpg)
Essentials of Environmental Health
Robert H. Friis, 2012![Epidemiology for public health practice](http://cdn.ketabkoo.com/covers/12/1208516-n.jpg)
Epidemiology for public health practice
Friis, Robert H.; Sellers, Thomas A., 2014![Essentials of Environmental Health](http://cdn.ketabkoo.com/covers/12/1264154-n.jpg)
Essentials of Environmental Health
Robert H. Friis, 2012![Essentials of Environmental Health, 3rd edition](http://cdn.ketabkoo.com/covers/12/1264931-n.jpg)
Essentials of Environmental Health, 3rd edition
Robert H. Friis, 2019![Epidemiology 101](http://cdn.ketabkoo.com/covers/13/1321090-n.jpg)