@book {552,
	title = {British Hoverflies. An Illustrated Identification Guide},
	year = {2002},
	pages = {469},
	publisher = {British Entomological \& Natural History Society},
	organization = {British Entomological \& Natural History Society},
	edition = {2nd},
	isbn = {1899935053},
	author = {Stubbs, A.E and Falk, S.J}
}
@book {551,
	title = {Britains{\textquoteright} Hoverflies. An introduction to the hoverflies of Britain},
	year = {2015},
	pages = {212},
	publisher = {Princeton University Press},
	organization = {Princeton University Press},
	edition = {Updated Second edition},
	isbn = {069116441X},
	author = {S.G Ball and Morris, R}
}
@book {549,
	title = {A Dipterist{\textquoteright}s Handbook},
	year = {2010},
	pages = {525},
	publisher = {Amateur Entomologists{\textquoteright} Society},
	organization = {Amateur Entomologists{\textquoteright} Society},
	edition = {2nd revised},
	isbn = {0900054778},
	author = {Chandler, P}
}
