Geochemical environment in relation to health and disease :  American Association for teh Advancement of Science symposium, Dec., 1970 / 
edited by Helen L. Cannon and Howard C. Hops 
 - Boulder, Colo. :  Geological Society of America,  1972 
 - 77 p. :  ill. ;  24 cm. 
 - Special paper (Geological Society of America)  140 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental health--Congresses<br/>Trace elements in the body--Congresses<br/>Geochemical diseases--Congresses