@book{9975,
	author = {Jones, Thomas H.},
	title = {Elm bark beetles.},
	publisher = {U.S. Govt. Print. Off.,},
	year = {1939]},
	series = {United States. Dept. of Agriculture. Leaflet},
	address = {Washington,},
	note = {Contribution from Bureau of Entomology and Plant Quarantine.}
}