http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
When unscrupulous scientists try to kidnap Norby in order to learn the secret of the robot's anti-gravitational capabilities, he and Jeff discover on the dragon-inhabited planet Jamya the key to an even more precious secret.
Previously published as Norby the mixed-up robot, and Norby's other secret.