@misc{indiciae82f47470ebc3,
  title = {An assessment of African test sites in the context of a global network of quality-assured reference standards},
  author = {G. Chander and X. Xiong and A. Angal and T. Choi},
  year = {2009},
  doi = {10.1109/igarss.2009.5417687},
  url = {https://pubs.usgs.gov/publication/70035400},
  note = {Source identifier: 70035400}
}