@article {4,
	title = {Dahlbom, A.G. 1854. Hymenoptera Europaea praecipue borealia; formis typicis nonnullis Specierum Generumve Exoticorum aut Extraneorum propter nexum systematicus associatis; per Familias, Genera, Species et Varietates disposita atque descripta.Vol 2, xxiii },
	year = {1854},
	author = {Dahlbom, A G}
}
