@misc{indiciaed9f40576b6d5,
  title = {The use of MAGSAT data to determine secular variation},
  author = {J.C. Cain and J. Frayser and L. Muth and D. Schmitz},
  year = {2012},
  doi = {10.1029/jb088ib07p05903},
  url = {https://pubs.usgs.gov/publication/70011272},
  note = {Source identifier: 70011272}
}