This series contains materials compiled by Greb during his research to identify Charles Herrold’s San Jose broadcasting station as the first one in the world. Herrold’s station began operating in 1909 out of a school run by Herrold, and continues today as San Francisco’s KCBS. Materials in this series include interviews conducted by Greb of Herrold’s colleagues, documents from the 50th anniversary of broadcasting celebration that Greb organized, newspaper clippings and copies of talks and lectures Greb presented on the topic.