Here's the key to the images and icons from the cover, created by Nancy Terzian/Buckinghorse Design:

Typewriter in the center: Martha Gellhorn

Hands above the typewriter: Helen Keller and Annie Sullivan

     From there in clockwise order:

Test tube: Henrietta Lacks

Woman Welding: Rosie the Riveter

Plane: Amelia Earhart

Josephine Baker

Tattooed chest: Maud Stevens Wagner

Sculpture: The Death of Cleopatra, by Edmonia Lewis

Graph paper: Julia Morgan

Star-filled sky (behind "Women"): Henrietta Swan Leavitt