Aunt Jane's Nieces in the Red Cross — Edith Van Dyne

The "Aunt Jane's Nieces" series was a wildly popular juvenile fiction collection written by L. Frank Baum, the author of The Wonderful Wizard of Oz, using the feminine pen name "Edith Van Dyne." This book, the last in the series, has the girls tending to wounded soldiers in the early battles of World War I.