@misc{indiciae6dd357042aac,
  title = {Holocene alpine soils in gneissic cirque deposits, Colorado Front Range},
  author = {Peter W. Birkeland and R. M. Burke and R. R. Shroba},
  year = {1987},
  doi = {10.3133/b1590e},
  url = {https://pubs.usgs.gov/publication/b1590E},
  note = {Source identifier: b1590E}
}