"United States" . . "History, 20th Century United States." . . "History, 19th Century." . . . . . . . . . . "Civil War doctor : the story of Mary Edwards Walker" . . "Civil War doctor : the story of Mary Walker" . . "Biography" . . . . . . "A biography of Mary Edwards Walker was one of the first women to receive a medical degree in the United States and went on to serve as a doctor to the Union soldiers during the Civil War. Her unconventional and determined life paved the way for generations of women in medicine and beyond." . . "History" . . "Juvenile works" . . . . . . . . . . . . . "Women Biography." . . "1861 - 1865" . . "Military Medicine United States History." . . "American Civil War." . . "Military Medicine History." . . "Physicians." . . "Women's Rights History." . . "Physicians, Women United States Biography." . . "Women's Rights United States History." . . "History, 19th Century United States." . . "History, 20th Century." . . . . "American Civil War United States." . .