Agricola had a post office from the 1875 until 1974. The post office was originally called Hardpan for some time.
- U.S. Geological Survey Geographic Names Information System: Agricola, Kansas
- Blackmar, Frank Wilson (1912). Kansas: A Cyclopedia of State History, Embracing Events, Institutions, Industries, Counties, Cities, Towns, Prominent Persons, Etc. Standard Publishing Company. p. 32.
- "Kansas Post Offices, 1828-1961 (archived)". Kansas Historical Society. Archived from the original on October 9, 2013. Retrieved 6 June 2014.
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