| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO E. E. BLAUROCK REGARDING MINUTES OF THE TANK TRACK ENGINEERING COMMITTEE MEETING] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO DR. J. E. COLBY REGARDING UNABLE TO VISIT THIS HOLIDAY SEASON] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO DR. J. C. COLBY REGARDING NOTE AND MORTGAGE] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO DR. AND MRS. J. E. COLBY REGARDING EXECUTED RELEASE OF MORTGAGE] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO DELMAR G. ROOS REGARDING ENGINEERING RELATION] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO DAVID BROWN REGARDING HOLIDAY GREETINGS] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO D.M. SHACKELFORD REGARDING KIND INVITATION TO ATTEND THE SEMI-ANNUAL MEETING OF THE GAS TURBINE POWER DIVISION] [WITH ATTACHMENTS] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO D. J. CROWLEY REGARDING THANK YOU FOR CONGRATULATIONS ON AWARD OF LEGION OF MERIT][WITH ATTACHMENT] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO COLONEL W. E. BECKER REGARDING UPCOMING RESEARCH AND DEVELOPMENT VISIT] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO COLONEL W. E. BECKER REGARDING APPRECIATION FOR COURTESIES DURING RECENT VISIT] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO COLONEL W. D. WATSON REGARDING RESPONSE TO 6 NOVEMBER LETTER] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO COLONEL W. D. WATSON REGARDING LOOKING FORWARD TO YOUR VISIT] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO COLONEL TOYO R. GREGORY REGARDING CONGRATULATIONS ON PROMOTION] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO COLONEL S. B. RITCHIE REGARDING RETIREMENT] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO COLONEL S. B. RITCHIE REGARDING RESPONSE TO COLONEL LEMON'S 17 MAY 1946 LETTER] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO COLONEL S. B. RITCHIE REGARDING RECOMMENDATION OF COLONEL MCCLELLAND][WITH ATTACHMENTS] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO COLONEL S. B. RITCHIE REGARDING NEW POSITION] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO COLONEL S. B. RITCHIE REGARDING LABORATORY PROJECT REVIEWED BY GENERAL HUGHES] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO COLONEL S. B. RITCHIE REGARDING GERMAN FILM OF THE EXPERIMENTAL TRIALS OF THE B-2 ROCKET] |
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| [CORRESPONDENCE FROM COLONEL JOSEPH M. COLBY TO COLONEL S. B. RITCHIE REGARDING ATTEMPTS TO GET THE EXCEPTIONAL CIVILIAN SERVICE AWARD FOR MR. KYNOCH] |
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