Columbia subject headings:
Egypt--Civilization.
Imhotep, active 2667 B.C.-2648 B.C.
Pyramids.
Harvard subject headings:
Egypt--Civilization--Juvenile literature.
Egypt--Civilization.
Egypt--History--Third dynasty, ca. 2649-2575 B.C.--Juvenile literature.
Imhotep,
Imhotep, active 2667-2648 B. C.
Pyramids
Pyramids--Juvenile literature.
Princeton subject headings: