1:50 000 digital mapping, five year program : internal working document : [Canada] = 1:50 000 cartographie numérique, plan quinquennal : document de travail interne : [Canada].
Canada.Surveys and Mapping Branch.
[Ottawa] : Canada, Dept. of Energy, Mines, and Resources, Surveys and Mapping Branch,
c1982-83.
Published annually.
Digital mapping.