1. Standard map of Chisago County, Minnesota : showing portions of Anoka and Isanti counties. Maps University Of Minnesota Public content 1920. McGill-Warner Co. Cartographic Details: Scale [1:84,480]. 3/4 in. = 1 mile. (W 92°10'--W 92°37'/N 45°45'--N 45°16'). Main auto roads and secondary roads shown in ora... McGill-Warner Co. (Saint Paul, Minnesota), 1920.