1. NBS, ‘Ionospheric Radio Propagation’, Circular 462, National Bureau of Standards, Washington, 1948
2. ‘Analysis and prediction of sky-wave field intensities in the high frequency band’, U.S. Signal Corps, Radio Propagation Unit Tech Report, 9, 1950
3. ‘The calculation of the median sky-wave field strength in tropical regions’, DSIR Radio Research Special Report, 27, HMSO, London, 1959 Code No. 47-29-27