1. Og of the cave people Title: Og of the cave people Date: ©1935. Author: Crump, Irving, 1887-1979. Collecting Area: Mathes Childrens Literature Call number: YH C956 O3 LOCAL
2. The cave twins, Title: The cave twins, Date: 1916. Author: Perkins, Lucy Fitch, 1865-1937. Collecting Area: Mathes Childrens Literature Call number: YH P449 C3 1916 LOCAL
3. The cave twins. Title: The cave twins. Date: [1968, ©1916] Author: Perkins, Lucy Fitch, 1865-1937. Collecting Area: Mathes Childrens Literature Call number: YH P449 C3 1968 LOCAL