Dougherty, H. T. <br/><br/>
The Role of Elevated Ducting for Radio Service and Interference Fields: / 
H. T. Dougherty, E. J. Dutton 
 - Washington, D.C. :  United States Government Printing Office,  1981 
 - v, 55 p. :  maps. ;  26 cm. 
<br/><br/> NTIA-Report-81-69 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Personal communication service systems--United States<br/>Radio--Monitoring receivers--United States
<br/><br/><label>Dewey Class. No.: </label>384.50973