of Monthly Normals 1991–2020 (pdf). National Oceanic and Atmospheric Administration. [2021-05-05]. (原始内容存档于2021-05-05). Chicago/O'Hare, IL Climate Normals
flooding of the Beringia Land Bridge dated to 11,000 cal yrs YBP based on new geophysical and sediment records. Climateof the Past(英语:Climateof the Past)
Survey. Chicago and North Western Railway Company. A History of the Origin of the Place Names Connected with the Chicago & North Western and Chicago, St.