A new collection has been added to the Digital National Security Archive (available to Oxford users via OxLIP+): US Intelligence and China: Collection, Analysis, and Covert Action.
From the DNSA description:
This collection includes more than 2,300 documents providing new insights into aspects of intelligence operations, with the results of most of these efforts, naturally, kept highly classified. The resulting finished intelligence addressed a diversity of topics, ranging from military capabilities to domestic policies, and which was critical in helping to shape U.S. policy toward the emerging world power. This collection provides insights into all these aspects of intelligence operations, revealing U.S. concerns about its rival, China, and its ally, Taiwan.
For more information on the contents of this collection, see http://nsarchive.chadwyck.com/collections/content/CI/intro.jsp.
Keep an eye on our resources blog for an upcoming post on sources for declassified documents, including the DNSA.