Heck, Walter W. <br/><br/>
Nitrogen-dioxide :  time-concentration model to predict acute foliar injury / 
by Walter W. Heck 
 - Washington, D. C. :  United States Government Printing Office,  1979 
 - vi, 17 p. ;  28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrogen oxides--Toxicologyes<br/>Nitrogen oxides--Environmental aspectses<br/>Air--Pollution--Measurementes
<br/><br/><label>Dewey Class. No.: </label>615.921