@book {Oldroyd1954,
	title = {Diptera. Introduction and key to families},
	series = {Handbooks for the identification of British Insects.},
	volume = {9(1)},
	year = {1954},
	publisher = {Royal Entomological Society},
	organization = {Royal Entomological Society},
	url = {http://www.royensoc.co.uk/sites/default/files/Vol09_Part01.pdf},
	author = {Oldroyd, H.}
}
