A letterbox has a rubber stamp and a logbook instead of tradable items. A logbook signed by the judge on the bench has to certify their weekly attendance. Individual letterboxes usually contain a logbook and a rubber stamp. His diary of the tour, "Rolling Thunder Logbook", was published in 1978. Military students without a rigger logbook will have to provide proof of experience. Sherman, her first commanding officer, begins reading his wartime personal logbook, and a flashback begins. The following cache types don't contain a physical logbook. By this time, Lent had accumulated 63 flights in his logbook. Now in control of the scanner and the logbook. There are several programs to help radio operators in the management of their logbook. On another occasion Hanson sneezed while writing in his logbook. An anonymous logbook, attributed to a writer of the crew, was found. The prosecution had the logbook disregarded as "incorrect". Laura and Hanson examine the logbook for clues about Peters fate. Details may be found in "The 12 O'Clock High Logbook".