@article{MarshClawsonRoe2008,
  author    = {Charles Dwight Marsh and Arthur Brooks Clawson and G. C. Roe},
  title     = {Four species of range plants not poisonous to livestock},
  journal   = {Technical bulletin / United States Department of Agriculture ; Agricultural Marketing Service},
  volume    = {93},
  pages     = {1 -- 9},
  year      = {2008},
}