Submitted by Wiliam Lorfing on Thu, 12/16/2010 - 10:31am OLLI, the Osher Lifelong Learning Institute, presents Greg Voelm and his lecture 'Hidden History of Northern California.' Details Duration: 1 hour 55 minPBCore Genres: Arts & Culture Lecture HistoryPBCore FCC Ratings: General Audiences - TV-G/ TV-PGPBCore Languages: EnglishCategory: DCTV - Locally ProducedDisposition: DCTV Playback ShelvesFormat: DVD