ULARNAGA Airliner World (Mediterranean Package Tours - Cal Air/Novair International Airways), Key Publishing, Stamford, UK, October 2010, p. BA cuts, BCal adds, World News, Flight International, 9 October 1982, p. BCal takes another step towards lower fares, Flight International, 8 May 1982, p. BA loses Gatwick-Zurich to Laker, Flight International, 21 March 1981, p. Laker’s routes are frozen, Flight International, 13 March 1982, p. CAA applies brake to UK airlines' European low-fare plans, Flight International, 22 March 1980, p.|Sekali Terkena Virus, akan Berakibat Fatal