John R. Cronin of Winthrop, formerly of East Boston, the former chief librarian of the Boston Herald, died Saturday at Meadow Green Nursing Home in Waltham. He was 79.
Mr. Cronin was born and raised in Cambridge and was a veteran of the U.S. Air Force.
He attended St. John’s Seminary at Boston College and was a gradute of Catholic University, where he received his master’s degree. He was a member of the Special Library Association.