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The first California Jam was held on April 6, 1974.
This rock festival concert drew a crowd of 300-400, 000, the largest paid attendance for a rock concert.
Portions of the concert were televised live on ABC.
The performers included ( in order of appearance ) Rare Earth, Earth, Wind & Fire, Eagles, Seals and Crofts, Black Oak Arkansas, Black Sabbath, Deep Purple and Emerson, Lake & Palmer.
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