@misc{indiciaecfcac0a04a79,
  title = {2.8-Ma ash-flow caldera at Chegem River in the northern Caucasus Mountains (Russia), contemporaneous granites, and associated ore deposits},
  author = {P. W. Lipman and O.A. Bogatikov and A.A. Tsvetkov and C. Gazis and A.G. Gurbanov and K. Hon and N.V. Koronovsky and V.I. Kovalenko and P. Marchev},
  year = {1993},
  url = {https://pubs.usgs.gov/publication/70017359},
  note = {Source identifier: 70017359}
}