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บรรณานกรม
                                                                   ุ

                       US.ARMY.(1969). FM. 5-34  ENGINEER  FIELD  DATA , HEADQUARTERS,

                                      DEPARTMENT  OF THE  ARMY , WASHINGTON. D.C.: UNITEDSTATES

                                      GOVERNMENT PRINTING

                       ------------.(1970). FM. 5-36  ROUTE RECONNAISSANCE  AND CLASSIFICATION

                                      HEADQUARTERS, DEPARTMENT  OF  THE  ARMY. WASHINGTON. D.C.:
                                      UNITEDSTATES  GOVERNMENT PRINTING
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