sept story correct headline clarify time request paragraph fanny potkin michael martina london/beijing britain cambridge university press reject request chinese state-owned importer block online access china scholarly article american political science review request indeed make chinese importer act upon cambridge university press content block spokeswoman cup say email statement cup late clarify request make early last month china state council information office tell reuters friday importers foreign publications must verify products legal august cup publish arm elite cambridge university reverse decision block online access china several hundred article book review china quarterly lead academic journal chinese affairs publish since 1960s say block article cover sensitive topics include 1989 tiananmen square democracy protest 1966-76 cultural revolution tibet order keep academic educational materials available china academics call decision affront academic freedom state council information office respond fax two weeks reuters request comment say publishers choose import materials base market demand law publications import china market must adhere chinese laws regulations publication importers responsible check content import publications say without mention cup uk publisher reject request block academic article china