Subjects: Pioneers -- West (U.S.) -- History -- Juvenile literature; Frontier and pioneer life -- West (U.S.) -- Juvenile literature; Overland journeys to the Pacific -- Juvenile literature
Record details
Subjects: Indians of North America -- History -- Juvenile literature; Indians of North America -- Social life and customs -- Juvenile literature
Subjects: Arithmetic -- Juvenile literature; Zero (The number) -- Juvenile literature
Subjects: Two (The number) -- Juvenile literature; Arithmetic -- Juvenile literature
Subjects: Mathematical notation -- Juvenile literature; Addition -- Juvenile literature; Subtraction -- Juvenile literature
Subjects: Mathematical notation -- Juvenile literature; Estimation theory -- Juvenile literature