Topographic Map of Maryland, Virginia, Washington D.C. (1947) 

 -  Army Map Service 
 -  29" x 41" 
<br/><br/> This is two maps taped together - NJ 18-1 (Baltimore/Washington D.C.)  and NJ 18-4 (Southern Maryland)  Hand-annotated with locations on map of microwave towers.  Notations at bottom with Lat/Long and height of towers.