AMERICAN GOVERNMENT CONTINUITY AND CHANGE 2006 EDITION
KAREN OCONNOR LARRY J.SABATO2006 年出版792 页ISBN：
SIGNALS，SYSTEMS，AND TRANSFORMS FOURTH EDITION
（美）CHARLES L.PHILLIPS，JOHN M.PARR，EVE A.RISKIN著2009 年出版772 页ISBN：
Radio wave propagation : principles and techniques
Jacques Lavergnat and michel sylvain and john c.nelson2000 年出版292 页ISBN：047149027X
