I don't think it's fake. Later shots of the lady indicate same bone-structure.
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I tried the Library of Congress but the issue isn't available.
I believe it's Bernardine Dohrn; no reason why it shouldn't be.
Lots of boys and girls took nudes of each other, it wasn't hard
to get photos developed, plus there were always Polaroids.
J. Edgar put a spy on their staff; maybe back copies can be found in FBI files.