"Zoos Juvenile fiction." . . "Zoos Fiction." . . . . "School field trips Fiction." . . "School field trips Juvenile fiction." . . . . . . . . . "Fiction" . . "The Little Engine that Could goes on a class trip" . . "While on a field trip at the safari zoo, The Little Engine that Could helps to find a lost baby elephant." . . . . . . . . . . "Juvenile works" . . . . . . "Railroad trains Fiction." . . "Lost children Fiction." . . "Railroad trains Juvenile fiction." . .