000 00257nam a2200109Ia 4500
008 220201s1974 xx 000 0 eng d
100 _aSMITH R C
245 0 _aMECHANICS
260 _aLONDON
_bELEMENT OF RADIO SURVEYING
_c1974
300 _a263
942 _2ddc
999 _c89637
_d89637