"Juvenile works" . . "Encyclopedia of landforms and other geologic features" . . . . "U*X*L encyclopedia of landforms and other geologic features" . "Explores the physical structure of the Earth's landforms, including what they are, how they look, how they were created and change over time, and major geological events associated with each." . "Encyclopedias" . . . . . . . "UXL encyclopedia of landforms and other geologic features" . . . .