@book {451,
	title = {Hymenoptera 2. Symphyta Section (b)},
	series = {Handbooks for the Identification of British Insects. },
	volume = {6.2(b)},
	year = {1952},
	pages = {51-37},
	publisher = {Royal Entomological Society},
	organization = {Royal Entomological Society},
	url = {http://www.royensoc.co.uk/sites/default/files/Vol06_Part02b.pdf},
	author = {Benson, RB}
}
