@article {542,
	title = {Variation in the seventh sternum of females of the house-martin flea Ceratophyllus farreni Rothschild, with remarks on synonymy.},
	journal = {Entomologist 88(1101): 41-45.},
	year = {1955},
	pages = {470},
	author = {Smit, F. G. A. M. and Allan, R. M.}
}
