Cadillac 1993 Fleetwood Owners Literature page 71

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Larger Children
Children who have outgrown child restraints should wear the vehicle's
safety belts.
If you have the choice, a child should sit next to a window so the child can
wear a lap-shoulder belt and get the additional restraint a shoulder belt
can provide.
Accident statistics show that children are safer if they are restrained in
the rear seat. But they need to use the safety belts properly.
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