ISBN:

• 0778713865
• 0778713547

Description: 32 pages : color illustrations ; 29 cm.

Notes: Includes index.

LCCN: 2004013062

Control Number: 766530

Series:

• Medieval world
• Medieval worlds series.

Subjects:

• Science, Medieval -- Juvenile literature.
• Technology -- History -- To 1500 -- Juvenile literature.

Other Authors: Groves, Marsha.