@misc{indiciae91c51e7499b8,
  title = {Worldwide directory of national earth-science agencies},
  author = {Wenonah E. Bergquist and R. L. Miller and A.L. Falk and J.A. Tyskowki},
  year = {1978},
  doi = {10.3133/cir771},
  url = {https://pubs.usgs.gov/publication/cir771},
  note = {Source identifier: cir771}
}