NPR: National Public Radio
Npr: Conventions Past: 1968: Antiwar Rioters Engulf the Democrats
NPR looks back at the 1968 Democratic National Convention in Chicago, known for the antiwar student demonstrations staged there and the violence they engendered, not just election-year politics.
PBS
Pbs News Hour: Retrospective on the 1968 Democratic Convention
A brief summary looking back at the Democratic Convention. Follow the link to Terry Southern's piece for a first person account from 1968.