Id Url Resource class Title Description Source https://policing.umhistorylabs.lsa.umich.edu/s/crackdowndetroit/item/6246 Ken Cockrel Interview Groundwork 1973 "An Interview with Kenneth Cockerel," Groundwork, July-August 1973, The American Radicalism Collection: Part 4: Twentieth-Century Social, Economic, and Environmental Movements, Michigan State University, Political Extremism & Radicalism, http://tinyurl.galegroup.com/tinyurl/8Dgti1