@misc{prest1975surficial,
  title = {Surficial geology map of Montreal Island 1/50 000}
  author = {Prest, V.K. and Hode-Keyser},
  url = {https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/fullf.web&search1=R=119515},
  year = {1975}
}