Girl's Adventure Series: The Campfire Girls/Project Gutenberg

How Ethel Hollister Became a Campfire Girl (Benson)
Ethel Hollister's Second Summer as a Campfire Girl (Benson)
Campfire Girls at Twin Lakes; The Quest of a Summer Vacation (Francis)
Campfire Girls in the Allegheny Mountains; or, A Christmas Success against Odds (Francis)
The Camp Fire Girls at Camp Keewaydin; Or, Paddles Down (Frey)
The Camp Fire Girls at School; Or, The Wohelo Weavers (Frey)
The Camp Fire Girls Do Their Bit; Or, over the Top with the Winnebagos (Frey)
The Camp Fire Girls in the Maine Woods; Or, The Winnebagos Go Camping (Frey)
The Camp Fire Girls Go Motoring Or, Along the Road That Leads the Way (Frey)
A Campfire Girl's First Council Fire; The Camp Fire Girls In the Woods (Stewart)
The Camp Fire Girls at Long Lake; Bessie King in Summer Camp (Stewart)
The Camp Fire Girls on the Farm; Or, Bessie King's New Chum (Stewart)
The Camp Fire Girls on the March Bessie King's Test of Friendship (Stewart)
The Camp Fire Girls at Sunrise Hill (Vandercook)