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The Commemorative
Quarter for
North Dakota

Miscellaneous References and Mentions

While our initial information about Portal came from various goverment sources (GNIS, US Census, FIPS), we also found mention of Portal in various books, maps and other sources.

We've created the following list to keep track of the sources that proved useful in adding to our knowledge about Portal. We hope that they will be useful to you.

Note: When we started collecting data about Portal, we were inconsistent about keeping track of where that data came from. As a result, this list of references and mentions is probably incomplete.

Rand McNally Map of North Dakota (1937)

Published by Rand McNally & Co.

Shell Oil Road Map for North Dakota (1949)

Published by Shell Oil Company

In addition:

Portal is contained in a comprehensive list of Post Offices that was created by Cameron Blevins and Richard Helbock.<1>

We found Portal in these Censuses: 2010-1990. See our Census Page for Portal for more information.

Both the GNIS and FIPS databases contain entries for Portal. See our Misc Page for Portal for more information.

Railroad Mentions of Portal:

Portal was mentioned in the following schedules:

Chicago and Northwest Railway Time Table (June 1913)

Canadian Pacific Railroad Time Tables (October 1899)

Footnotes ...

<1>	A copy of the Blevins & Helbock Post Office list with background information can be found at: https://cblevins.github.io/us-post-offices/data-biography/