Shark attack, 1975-07-23 (Unprovoked)
Location: Perch Rock, Point Conception, Santa Barbara County, California, USA
Time: 14h30
Activity: Scuba diving for abalone (at surface)
Victim: Robert Revstock (M, age 23)
Injury: Legs bitten
Fatal: N
Species: White shark, 5.8 m [19'] 
Source: D. Miller & R. Collier; R. Collier, pp.64-65; G. Ambrose, pp.103 & 112