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100   $a20020821d1953----km-y0itay50------ba
101 0 $aeng
105   $aa-------001yy
200 1 $aSoft magnetic materials for telecommunications$ea symposium held at the post office engineering research station in april 1952$fC. E. Richards, A. C. Lynch
210   $aLondon$cPergamon press$d1953
215   $a346 p.$cill.$d22 cm
610 0 $aMateriali magnetici
610 0 $aIngegneria delle telecomunicazioni
676   $a621.382
700  1$aRichards,$bColbert Eric
701  1$aLynch,$bA. C.
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