@article{hansen_black_1977,
	title = {Black tail prairie dogs, desert cottontails, and cattle trophic relations on shortgrass range},
	volume = {30},
	number = {3},
	author = {Hansen, RM and Gold, IK},
	year = {1977},
	keywords = {SGS, shortgrass range, cattle, trophic ecology, prairie dogs, cottontails}
}