@book {49350,
	title = {Diptera scandinaviae, disposita et descripta},
	volume = {12},
	year = {1855},
	pages = {xx + 4547-4942},
	address = {Lundae},
	author = {Zetterstedt, Johann Vilhelm}
}
@book {49349,
	title = {Diptera scandinaviae, disposita et descripta},
	volume = {11},
	year = {1852},
	pages = {xii + 4091-4545},
	address = {Lundae},
	author = {Zetterstedt, Johann Vilhelm}
}
