@book{11069,
	author = {Davis, John J. and Packard, C. M.},
	title = {The corn root aphid and methods of controlling it.},
	publisher = {U. S. Govt. Print. Off.,},
	year = {1949]},
	series = {Farmers' bulletin,},
	address = {Washington,},
	note = {Contribution from Bureau of Entomology and Plant Quarantine.}
}