Dorothy Arzner wasn’t the first female film director in the U.S., but she was really the only one working in the studio system during most of the period that’s known as the Hollywood Golden Age. Her short career was still incredibly prolific.
Research:

Elizabeth Peratrovich
43:42

SYMHC Classics: Dr. Lucy Hobbs Taylor
29:58

Behind the Scenes Minis: Carry-on Bags
28:38