@article {44293,
	title = {Ectoparasites of the House Martin, Delichon urbica in western Spain. 133, 41-48.},
	journal = {Entomologist{\textquoteright}s Monthly Magazine},
	volume = {133},
	year = {1997},
	month = {1997},
	pages = {41 - 48},
	author = {Clark,Frank and L. A. Hill}
}
@article {39592,
	title = {A study of a population of the house martin (Delichon urbica (L.)) feather louse Br{\"u}elia gracilis (Mallophaga: Ischnocera) in Lincolnshire, UK},
	journal = {Entomologist},
	volume = {113},
	year = {1994},
	month = {1994},
	pages = {198 - 204},
	author = {Clark,Frank and Farrel,J. and L. A. Hill}
}
