Great Northern Railway Historical Society Blueprint Collection JSBP3387, Minneapolis, Minnesota, 1928. Great Northern Blueprint Number 8024-21, Extension to Mail and Express Building. Floor Plan and Details. Authorization for Expenditure 35453. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Depot.

Great Northern Railway Historical Society Blueprint Collection JSBP3388, Minneapolis, Minnesota, 1928. Great Northern Blueprint Number 8024-1, Extension to Mail and Express Building. 1st Floor Plan. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Depot.

Great Northern Railway Historical Society Blueprint Collection JSBP3393, Minneapolis, Minnesota, 1930. Great Northern Blueprint Number 8024-1, Extension to Mail and Express Building. First Floor Plan. Authorization for Expenditure 42019. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Depot.

Great Northern Railway Historical Society Blueprint Collection JSBP3394, Minneapolis, Minnesota, 1931. Mail and Express Building. Extension. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Station Facilities.

Great Northern Railway Historical Society Blueprint Collection JSBP3395, Minneapolis, Minnesota, 1931. Mail and Express Building. Extension. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Station Facilities.

Great Northern Railway Historical Society Blueprint Collection JSBP3396, Minneapolis, Minnesota, 1931. Extension to Mail and Express Building. Floor Plan and Section. Authorization for Expenditure 46934. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Express Building.

Great Northern Railway Historical Society Blueprint Collection JSBP3397, Minneapolis, Minnesota, 1931. Extension to Mail and Express Building. 2nd Floor Plan. Authorization for Expenditure 46934. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Express Building.

Great Northern Railway Historical Society Blueprint Collection JSBP3399, Minneapolis, Minnesota, 1932. Addition to Second Floor - Mail and Express Building. Floor Plan. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Express Building.

Great Northern Railway Historical Society Blueprint Collection JSBP3401, Minneapolis, Minnesota, 1933. Addition to Second Floor Scheme ''G''. Floor Plan and Section. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Mail and Express Building.

Great Northern Railway Historical Society Blueprint Collection JSBP3402, Minneapolis, Minnesota, 1933. Great Northern Blueprint Number 6, Addition to Second Floor Scheme ''G''. Floor Plan. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Mail and Express Building.