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

APA Citation

Central Radio Propagation Laboratory (U.S.). Basic radio propagation predictions for ... three months in advance. Washington, D.C.: The Laboratory .

MLA Citation

Central Radio Propagation Laboratory (U.S.). Basic Radio Propagation Predictions for ... Three Months In Advance. Washington, D.C.: The Laboratory ,

Warning: These citations may not always be complete (especially for serials).