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 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: Initially, we were careless about keeping track of where our Portal data came from. The following list of references and mentions is incomplete.

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.