00427nam a2200157Ia 4500 170901s1971 xx 000 0 und d 621.38411 D52P Dolukhanov, M. Propagation of Radio Waves Moscow Mir Publishers 1971 372 Engineering and allied operations Technology (Applied sciences) Radio waves ddc BK 11694 11694 0 0 ddc 0 0 RAU RAU 2017-10-18 Punjab Book Centre, Chandigarh 8.00 0 621.38411 D52P 25654 2017-10-18 1981-06-05 BK