00799nam a2200193Ia 4500 CTU_14150 210402s9999 xx 000 0 und d 621.38411 E37 Electromagnetic wave propagation : international conference sponsored by the Postal and Telecommunications Group of the Brussels Universal Exhibition Edited by M. Desirant, J. L. Michiels New York Academic Press 1960 Foreword, contributors, ray - geometry considerations for highly elavated antennas, researches on backscatter of radiowaves,... Electromagnetic waves,Sóng điện từ Nguyễn Quang Điền, Hải Trung tâm Học liệu Trường Đại học Cần Thơ