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	pages = {83},
	author = {Clark, F. and McNeil, D. A. C.}
}
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	year = {1981},
	pages = {84},
	author = {Clark, F. and McNeil, D. A. C.}
}
@article {244,
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	year = {1984},
	pages = {85},
	author = {Clark, F. and McNeil, D. A. C.}
}
@article {245,
	title = {Temporal variation in the population densities of fleas in house martin nests (Delichon u. urbica) (Linnaeus) in Leicestershire, UK.},
	journal = {Entomologist{\textquoteright}s Gazette 42(4): 218-288.},
	year = {1991},
	pages = {86},
	author = {Clark, F. and McNeil, D. A. C.}
}
