000
00289nam a2200109Ia 4500
008
210901s1971 xx 000 0 eng d
082
_a
537.12 OPE
100
_a
Open University press
245
0
_a
Electromagnetics and electronic
260
_b
Open University press
_c
1971
942
_2
ddc
_c
BK
999
_c
10425
_d
10425