This was also well documented in the late Barbara Olson's biography of the Hillary-thing "Hell to Pay." Recommended reading.
One more tidbit. Hillary's official resume at her Senate website, which is
HERE, discloses that she was "a 1973 graduate of Yale Law School," so for her to work at the commie law firm in 1971 means that she sought them out in her first year of law school. Eager little commie, wasn't she?