@book {Hopkin1991,
	title = {A Key to the Woodlice of Britain and Ireland AIDGAP (Aids to the Identification of Difficult Groups of Animals and Plants)},
	year = {1991},
	publisher = {Field Studies Council},
	organization = {Field Studies Council},
	isbn = {978-1851532049},
	author = {Hopkin, Stephen}
}
