Laura Lee Hope 
Outdoor Girls in Army Service [PDF ebook] 
Doing Their Bit for the Soldier Boys

When fighting breaks out in World War I, the Outdoor Girls set aside their leisure pursuits and do everything they can to aid the U.S. soldiers who have been shipped to the battlefields of Europe. They gather provisions, join the Red Cross, and help raise money for the YWCA. But when several of their friends volunteer to serve, the girls step up their efforts even more.