

@article {16226,
	title = {Duration of immunity in cattle in response to a viable, avirulent Leptospira pomona vaccine.},
	journal = {Am J Vet Res.Am J Vet Res.},
	volume = {32},
	number = {6},
	year = {1971},
	pages = {851-854.},
	author = {Stalheim, OH.}
}
