Shapefile of railways in North America between 1960 and 1980 based on historical cartography of different libraries. Shapefiles each 20 years because of the impossibility of finding historical cartogr
The RUBYVALE Mine map was published in 1973, charted in 1973 at 1:100 000 as part of the 1:100 000 series to administer permit and permit related spatial information. The map was maintained internall
