Search Results       Your search for [subject]United States. Navy -- Communication system returned 1 record.           U.S. naval cryptographic activities in the Philippines prior to World War II. Laguna Hills, Calif.: Aegean Park Press, 1982. Subject: United States. Navy -- Communication system; World War, 1939-1945 -- Cryptography; World War, 1939-1945 -- Secret service -- Philippines; Philippines -- History -- Japanese occupation, 1942-1945.          Add to Book Cart Relevance: 17.27%