| [REPORT REGARDING UNITED STATES NAVAL RADIO STATION, LIBUGON, GUAM] |
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| [REPORT REGARDING THE INDEX OF COINCIDENCE AND ITS APPLICATIONS IN CRYPTANALYSIS] |
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| [REPORT REGARDING STUDIES IN GERMAN DIPLOMATIC CODES EMPLOYED DURING THE WORLD WAR] |
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| [REPORT REGARDING RADIO INTELLIGENCE IN WWII, SUBMARINE OPERATIONS IN THE PACIFIC OCEAN AREAS, NOVEMBER 1943] |
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| [REPORT REGARDING RADIO INTELLIGENCE IN WWII, SUBMARINE OPERATIONS IN THE PACIFIC OCEAN AREAS, NOVEMBER 1943] |
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| [REPORT REGARDING RADIO INTELLIGENCE IN WWII, SUBMARINE OPERATIONS IN THE PACIFIC OCEAN AREAS, MARCH 1943] |
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| [REPORT REGARDING RADIO INTELLIGENCE IN WWII, SUBMARINE OPERATIONS IN THE PACIFIC OCEAN AREAS, MARCH 1943] |
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| [REPORT REGARDING RADIO INTELLIGENCE IN WWII, SUBMARINE OPERATIONS IN THE PACIFIC OCEAN AREAS, JANUARY-FEBRUARY 1943] |
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| [REPORT REGARDING RADIO INTELLIGENCE IN WWII, SUBMARINE OPERATIONS IN THE PACIFIC OCEAN AREAS, DECEMBER 1943] |
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| [REPORT REGARDING PRINCIPLES OF SOLUTION OF CRYPTOGRAMS PRODUCED BY THE I. T. AND T. CIPHER MACHINE] |
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| [REPORT REGARDING OP-20-G FILE OF FLEET RADIO UNIT, MELBOURNE (FRUMEL)] |
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| [REPORT REGARDING OP-20-G FILE OF FLEET RADIO UNIT, MELBOURNE (FRUMEL)] |
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| [REPORT REGARDING OBSERVATIONS ON SIGNAL INTELLIGENCE GAINED FROM NORTH AFRICAN THEATER OF OPERATIONS] |
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| [REPORT REGARDING MILITARY CRYPTANALYSIS, PART IV] |
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| [REPORT REGARDING MILITARY CRYPTANALYSIS, PART IV] |
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| [REPORT REGARDING MILITARY CRYPTANALYSIS, PART III] |
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| [REPORT REGARDING MILITARY CRYPTANALYSIS, PART III] |
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| [REPORT REGARDING MESSAGES FROM VARIOUS POSTS TO TOKYO ON UNITED STATES FLEET MOVEMENTS, 1940-1941] |
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| [REPORT REGARDING LIST OF NAMED JAPANESE SHIPS] |
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| [REPORT REGARDING JAPANESE DIPLOMATIC INTELLIGENCE ESPIONAGE NET IN FREE CHINA] |
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