<P> The ratings used from 1968 to 1970 were: </P> <Ul> <Li> Rated G: Suggested for General Audiences </Li> <Li> Rated M: Suggested for Mature Audiences--parental discretion advised </Li> <Li> Rated R: Restricted--persons under 16 not admitted, unless accompanied by parent or adult guardian . </Li> <Li> Rated X: Persons Under 16 Not Admitted </Li> </Ul> <Li> Rated G: Suggested for General Audiences </Li> <Li> Rated M: Suggested for Mature Audiences--parental discretion advised </Li>

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