Sources
https://www.biography.com/activist/harriet-tubman
https://www.ducksters.com/biography/women_leaders/harriet_tubman.php
http://www.harriet-tubman.org/
http://www.harriet-tubman.org/category/underground-railroad/
Get On Board, The Story of The Underground Railroad. Jim Haskins. Scholastic, 1993.
Haley Schara and Ava Hall