Miscellaneous References and Mentions

While our initial information about Twin Rocks came from various goverment sources (GNIS, FIPS), we also found mention of Twin Rocks 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 Twin Rocks. We hope that they will be useful to you.

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

North American Railroad Atlas - Northeast
Written by: Walker, Mike
Published by RailfanDepot, 2020
(Available from Amazon.com)

Rand McNally Map of Pennsylvania (1911)
Published by Rand McNally & Co.

Twin Rocks 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 Twin Rocks. See our Misc Page for Twin Rocks for more information.