Miscellaneous References and Mentions

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

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

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

Shell Oil Road Map for Oklahoma (1948)
Published by Shell Oil Company

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

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

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