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0890067481 from books.google.com
... 0890067481. Stutzman, W.L. and Thiele, G.A., (1998) Antenna Theory and Design, John Wiley and Sons, New York, 2nd Edition, ISBN 0471025909. Zaghloul, A.I., O. Kilic and A.E. Williams(2000), “Aperture Size Reduction Using Sub-Beam Design ...