000 00200 a2200097 4500
001 560
100 _aHMSO
245 _aAdmiralty H?Book of W/LessTelegraphy
260 _a
_bHMSO
_c
090 _c161
_d161
942 _aNUST-CAE
_cM
_c6780
999 _c235633
_d235633