The description on the front of the card:
The “Buckeye State”
Atwood Lake Park
Estimated Date: 1950s-1960s
No. in Series: SK7375
Era: Chrome Era
Publisher Notes: A “Shini Color” by Colourpicture Publishers, Boston, Mass.
Colourpicture Publishers of Massachusetts was a major printer and publisher of linen postcards and view-cards of the U.S. from 1938-1969. They later went on to publish photochromes and small spiral-bound picture booklets under the tradename Plastichrome in the 1950s.
Read more about Colorpicture Publishers
Rights Info: Most likely public domain due to inadequate copyright statements, but it would be best to credit the original publishers and distributors.