I: Aspinall, Simon: Status and Conservation of the Breeding Birds of the United Arab Emirates. Liverpool, Hobby Publications 1996. OKart. ISBN 1872839045 / II: Silsby, Jill: Inland Birds of Saudi Arabia. London, Immel 1980. OLn. m. OU. ISBN 0907151000 / III: Gallagher, Michael; Woodcock, Martin W.: The Birds of Oman. London, Quartet Books 1980. OLn. m. OU. ISBN 0704322161 / IV: Jennings, Michael C.: The Birds of Saudi Arabia. A Check-List. Cambridge, Jennings 1981. OKart. ISBN 0950740500. Books in fine condition.