For a time in 1968–1969 the high school underground press had its own press services, FRED (run by Clark Kissinger of SDS, with its base in Chicago schools) and HIPS (High School Independent Press Service, produced by students working out of Liberation News Service headquarters and aimed primarily but not exclusively at New York City schools). These services typically produced a weekly packet of articles and features mailed to subscribing papers around the country; HIPS reported 60 subscribing papers. In 1968 a survey of 400 high schools in Southern California found that 52% reported student underground press activity in their school.