More than five dozen Middlebury College students were disciplined for their roles in shutting down a speech by the author Charles Murray in March, the college announced this week. But the students were spared the most serious penalties in the episode, which left a faculty member injured and came to symbolize a lack of tolerance for conservative ideas on some campuses.

The college, in Middlebury, Vt., issued a statement on Tuesday describing sanctions against 67 students “ranging from probation to official college discipline, which places a permanent record in the student’s file.” The statement did not disclose how many students received the harsher punishment, but said, “Some graduate schools and employers require individuals to disclose official discipline in their applications.”

None of the students were suspended or expelled.

A college spokesman, Bill Burger, said the statement was intentionally vague because of concerns that releasing details would identify individual students, violating federal laws aimed at protecting student privacy.

An estimated 100 to 150 students at the liberal arts college shouted down Mr. Murray, who had been invited by a conservative student group. A political scientist who has written several books, he is best known for “The Bell Curve,” published in 1994, in which he linked socioeconomic status with race and intelligence. Student protesters said the book espoused a racist view that had no place on a college campus.