@misc{indiciae870344baa708,
  title = {Deriving annual integrated NDVI greenness at 30 m spatial resolution},
  author = {Chengquan Huang and Brian L. Tolk and James Vogelmann and Michelle L. Knuppe and Zhiliang Zhu},
  year = {2003},
  url = {https://pubs.usgs.gov/publication/70263457},
  note = {Source identifier: 70263457}
}