@dataset{currentDoc,
  author = {},
  title = {Barrie (West) Ontario. 1:50,000. Map Sheet 031D05, ed. 2, 1950},
  publisher = {Other Borealis Collections},
  issued = {1950-01-01},
  howpublished = {{\url{https://doi.org/10.5683/SP3/WROBLS}}}
}