@misc{indiciaee50609731518,
  title = {First flowering dates and flowering periods of prairie plants at Woodworth, North Dakota},
  author = {J.M. Callow and H.A. Kantrud and K.F. Higgins},
  year = {1992},
  url = {https://pubs.usgs.gov/publication/1001344},
  note = {Source identifier: 1001344}
}