Question: Where can I find out more about Open City, the radical newspaper from the 1960s?

I am doing a class project on radical newspapers of the 60's and am having trouble locating information on a paper called Open City. It was published in the 60's in San Francisco. I'm looking specifically for information regarding the paper's founders, dates of publication, circulation, mission statements, etc. Any info would be great. P.S. You guys rock. Librarians unite!!!