CURTIS William. J. La arquitectura moderna desde 1900. Edit. Phaidon. Hong Kong, 2006. 3ª edición en español. 1ª edición 1986 (edición original 1982)

http://dcaiga.blogspot.com.es/2011/07/national-farmers-bank-of-owatonna.html

http://dcaiga.blogspot.com.es/2011/07/national-farmers-bank-of-owatonna.html

http://archpaper.com/news/articles.asp?id=5061

A color postcard from c.1920

http://www.mnopedia.org/multimedia/national-farmers-bank-owatonna

http://www.flickriver.com/photos/switzers_nursery/8109400238/

http://travelphotobase.com/v/USMN/MNT032.HTM

http://www.flickriver.com/photos/switzers_nursery/8109399467/

http://www.greatbuildings.com/buildings/National_Farmers_Bank.html

http://www.greatbuildings.com/buildings/National_Farmers_Bank.html

http://www.greatbuildings.com/buildings/National_Farmers_Bank.html

http://www.greatbuildings.com/buildings/National_Farmers_Bank.html

http://www.greatbuildings.com/buildings/National_Farmers_Bank.html

http://www.greatbuildings.com/buildings/National_Farmers_Bank.html

http://dcaiga.blogspot.com.es/2011/07/national-farmers-bank-of-owatonna.html

http://dcaiga.blogspot.com.es/2011/07/national-farmers-bank-of-owatonna.html

http://www.oberlin.edu/images/Art240/Art240.html

http://www.greatbuildings.com/buildings/National_Farmers_Bank.html

http://www.mnpreservation.org/2011/03/02/little-bus-on-the-prairie/

http://www.flickriver.com/photos/tags/nationalfarmersbank/interesting/

http://louis-sullivan.blogspot.com.es/

http://en.wikipedia.org/wiki/File:LSOwatannaBank2.jpg

http://louis-sullivan.blogspot.com.es/

http://louis-sullivan.blogspot.com.es/2011/06/louis-sullivan-obras-parte-ii.html

http://en.wikipedia.org/wiki/File:LSOwatannaBank2.jpg

CURTIS William. J. La arquitectura moderna desde 1900. Edit. Phaidon. Hong Kong, 2006. 3ª edición en español. 1ª edición 1986 (edición original 1982)

http://www.flickriver.com/photos/tags/nationalfarmersbank/interesting/

http://louis-sullivan.blogspot.com.es/

http://www.greatbuildings.com/cgi-bin/gbi.cgi/National_Farmers_Bank.html/cid_aj1937_b.html

http://louis-sullivan.blogspot.com.es/