Khurana, Gurpreet S. Porthole Geopolitical, Strategic and Maritime terms and concepts / Gurpreet S Khurana - New Delhi : Pentagon Press, 2016. - xxiii, 220p. : hb ; 23.5 cm ISBN: 9788182748637 Subjects--Topical Terms: Geopolitical. Dewey Class. No.: 327.103 / KHU