A practical method for determining the directivity of H. F. and V. H. F. antenna systems /
by C. S. L. Keay and R. E. Gray.
APA Citation
Keay, C. S. L., Gray, R. E., University of Canterbury. (1964). A practical method for determining the directivity of H. F. and V. H. F. antenna systems. Washington, D. C.: National Aeronautics and Space Administration.
MLA Citation
Keay, C. S. L, R. E Gray, and University of Canterbury. A Practical Method for Determining the Directivity of H. F. And V. H. F. Antenna Systems. Washington, D. C.: National Aeronautics and Space Administration, 1964.
Warning: These citations may not always be complete (especially for serials).