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Redgate, N.D., 1989. Ischnopsyllus octactenus (Kolenati) (Siphonaptera: Ischnopsyllidae): a new vice county record. Entomologist?s Gazette 40(4): 336., p.348.

George, R.S., 1989. Megabothris turbidus (Rothschild) (Siphonaptera) from the Isle of Wight. Entomologist?s Gazette 40(1): 92., p.197.

George, R.S., 1989. Large populations of fleas (Siphonaptera) in birds? nests and a species new to England. Entomologist?s Gazette 40: 337-343., p.198.

George, R.S., 1989. A brief summary of the fleas of the Vice-Counties of Cardigan, Carmarthen & Pembroke and the islands of Cardigan, Ramsey, Skokholm & Skomer. Dyfed Invertebrate Group Newsletter No.14: 10-18., p.195.

George, R.S., 1989. Some bird flea records from Britain (Siphonaptera). Entomologist?s Gazette 40(4): 314., p.194.

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Clark, F., 1989. Studies on three congeneric species of fleas [Ceratophyllus] (Siphonaptera) from the nests of Delichon urbica urbica in England.  (Abstract). Index to Theses Accepted for Higher Degrees in the Universities of Great Britain and Ireland 38(1): 267 and Dissertation Abstrs International B 50(1): 48-B., p.80.