明尼苏达州县名辞源列表(英语:List of Minnesota county name etymologies) Minnesota Place Names. Minnesota Historical Society. [2007-09-17]. (原始内容存档于2007-08-14). Minnesota County History
721: Lime Creek (Lime Creek Observatory, NE) 722: Missouri City, TX 723: Cottonwood Observatory, Ada, OK 724: National Observatory, Tacubaya (Observatorio