Silent sentinels
Subtitle: the story of locks, vaults, and burglar alarms.
Edition: [1st ed.]
Publisher: Doubleday
Published: 1969
Place of publication: Garden City, N.Y
Language: eng
Number of pages: 127
Subjects: Vaults (Strong rooms) -- Juvenile literature.; Locks and keys -- Juvenile literature.; Burglar alarms -- Juvenile literature.; Vaults (Strong rooms); Locks and keys.; Burglar alarms.
Description: Describes the various means man has used to protect his valuables throughout history, from the Egyptian pyramids of ancient times to the elaborate vaults and burglar alarms of today.