Contained within the 4th Edition (1974) of the Atlas of Canada is a graph and two maps. The graph shows commodity exports by mode of transportation for 1966. Totals for Canada, the Atlantic provinces, Quebec, Ontario, the Prairie provinces as well as combined totals for British Columbia, the Yukon Territory and the Northwest Territories are shown. Regional and national percentages by mode of transportation and commodity are denoted. The two maps show the value of exports and the value of imports through customs ports by census division for 1966. Values by census division are shown as a percentage of the national total.