@misc{indiciaed4efec34f1ce,
  title = {Focused campaign increases activity among participants in Nature's Notebook , a citizen science project},
  author = {Theresa Crimmins and Jake F. Weltzin and Alyssa H. Rosemartin and Echo M. Surina and Lee Marsh and Ellen G. Denny},
  year = {2014},
  doi = {10.4195/nse2013.06.0019},
  url = {https://pubs.usgs.gov/publication/70110814},
  note = {Source identifier: 70110814}
}