Basic radio propagation predictions for ... three months in advance / prepared by Central Radio Propagation Laboratory, National Bureau of Standards

Published: Washington, D.C. : Central Radio Propagation Laboratory.
Washington, D.C. : For sale by the Sup't. of Docs., U.S. Gov't. Print. Off.
Physical Description: volumes : illustrations ; 27 cm.
Additional Creators: Central Radio Propagation Laboratory (U.S.)