Sách tham khảo Stephen A. Douglas

Tài liệu tham khảo

WikiPedia: Stephen A. Douglas http://www.hti.umich.edu/cgi/t/text/text-idx?c=moa... http://www.uvm.edu/~vhnet/histarch/hahd39.html http://bioguide.congress.gov/scripts/biodisplay.pl... http://woodstockhistorical.org/wp-content/uploads/... https://www.biography.com/people/stephen-a-douglas... https://books.google.com/books?id=KN8yAQAAMAAJ&pg=... https://books.google.com/books?id=kZlBAAAAYAAJ&pg=... https://books.google.com/books?id=pCzhaQTh5SEC&pg=... https://books.google.com/books?id=ptItAAAAYAAJ&pg=... https://www.history.com/topics/stephen-a-douglas