@article {	239	,
	title = {Studies on three congeneric species of fleas [Ceratophyllus] (Siphonaptera) from the nests of Delichon urbica urbica in England. (Abstract)},
	journal = {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.},
	year = {1989},
	author = {Clark, F.}
}
