Miscellaneous References and Mentions

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

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

Shell Oil Road Map for Iowa (1956)
Published by Shell Oil Company

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