000 00318nam a2200121Ia 4500
008 160710s1985 xx 000 0 und d
082 _a621.3842 RAL
100 _aRELPHS, J.D.
245 _aPRINCIPLES AND PRACTICE OF MULTI-FREQUENCY TELEGRAPHY
260 _bPETER PEREGRINUS
_c1985
300 _a205
942 _2ddc
_cB
999 _c54688
_d54688