Environmental health secrets / 
edited by Luanne Kemp Williams, Ricky L. Langley. 
 - Philadelphia, Pa. :  Harcourt Academic Press,  2001. 
 - xii, 266 p. :  il. 
 - The secrets series ; .
<br/><br/><label>ISBN: </label>1-56053-408-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Salud Ambiental
<br/><br/><label>Dewey Class. No.: </label>615.9´00  / E56