Map of Standard Time Zones of the United States and Adjacent Parts of Canada and Mexico as of January 1, 1948
Description: Map of the United States and surrounding areas with time zones marked and labeled in red. Bodies of water are marked, with depth marked by hatchures, as well as state lines and major cities..
Date: January 1, 1948
Creator: Geological Survey (U.S.)
Partner: UNT Libraries Government Documents Department