Richardson, David L. <br/><br/>
Manual for deciding chemicals: application practices / 
by David L. Richardson 
 - Wahngton :  United States Government Printing Office,  1974 
 - xii, 151 p. :  ill. ;  28 cm. 
 - Environmental protection technology series .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemicals<br/>Pollution
<br/><br/><label>Dewey Class. No.: </label>628.16836