National Data Procesion Division operational policies manual 

 - Washington, DC :  Office of Administration and Resources Managemen t,  1992. 
 - v. ;  30 cm. 
<br/><br/> EPA/208/B-92/001  Manual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental protection-- United States.
<br/><br/><label>Dewey Class. No.: </label>363.7