Davis, R.M. <br/><br/>
The occurence of speed F and its effect on HF propagation / 
R.M.  Davis 
 - Washington, D.C. :  United States Department of Commerce,  1972 
 - iii, 65 p. ;  ill. ;  28 cm. 
 - Telecommunications research and engineering report 28 .
<br/><br/> OT/TRER 28 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Atmospheric physics--Geography
<br/><br/><label>Dewey Class. No.: </label>551.5