1. ‘Study of the effective path length through rain in earth-space path’, Kokusai Denshin Denwa Co. Ltd., Research and Development Laboratories, Tokyo, Japan, April, 1976
2. ‘Propagation data required for space telecommunication systems’, CCIR Report, 564-1, International Telecommunication Union, Geneva, Switzerland, 1979 XIVth Plenary Assembly, Vol. V
3. Kheirallah, H.N.: ‘A study of tropospheric effects on satellite communications at 40 GHz’, March, 1976, M. Eng. thesis, Carleton University, Department of Electronics, Ottawa, Canada