Friis, Robert H. <br/><br/>
Essentials of environmental health / 
Robert H. Friis. 
 - Sudbury, Mass. :  Jones and Bartlett,  c2007. 
 - xxvi, 390 p. :  ill., maps ;  28 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0763747629 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental health.