Coba jelasin Publikasi pilihan dari Gibraltar Study Circle dong

Gibraltar Postal Stationery by Walter (Wally) Jackson, 1977.

British Post Offices and Agencies in Morocco 1857-1898 by Dr. R.K. Clough, 1978.

Gibraltar First Day Covers by R.H. Neville, 1984.

Gibraltar: The postal history and postage stamps. Volume 1 To 1885 by Geoffrey Osborn, 1995.

Gibraltar Errors & Varieties 1885-2000 by R.G.W. Burton, 2001.

Gibraltar: Collecting King George VI by Edmund Chambers, 2005. ISBN 0-9509947-4-X

Gibraltar: The postal history and postage stamps. Volume 4 Gibraltar Postal Stationery by Eric D. Holmes & Robert H. Neville, second edition, 2006. ISBN 0-9509947-7-4