Miscellaneous References and MentionsWhile our initial information about Portage came from various goverment sources (GNIS, FIPS), we also found mention of Portage 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 Portage. We hope that they will be useful to you. Note: When we started collecting data about Portage, we were inconsistent about keeping track of where that data came from. As a result, this list of references and mentions is probably incomplete. Business Atlas and Shippers' Guide (1895)
A note taken from the Shipper's Guide for Portage: North American Railroad Atlas - Mountain Plains
Hixson Map of Montana (1950)
Portage is contained in a comprehensive list of Post Offices that was created by Cameron Blevins and Richard Helbock.<1> Both the GNIS and FIPS databases contain entries for Portage. See our Misc Page for Portage for more information. Footnotes ...
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