000
00312nam a2200109Ia 45e0
008
181001s1950 xx 000 0 und d
100
_a
Jardon E.C.
245
0
_a
Electromagnetic waves ------- systems
260
_a
Delhi
_b
Prentice Hall
_c
1950
300
_a
284
942
_2
ddc
_c
BK
999
_c
1926
_d
1926