@dataset{currentDoc,
  author = {},
  title = {Echo Lake (West) Ontario. 1:50,000. Map Sheet 041J12, ed. 1, 1957},
  publisher = {Other Borealis Collections},
  issued = {1957-01-01},
  howpublished = {{\url{https://doi.org/10.5683/SP3/QXI5GR}}}
}