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%0 Journal Article
%A Poerschke, R.
%A Wollenberger, H.
%T A helium-cooled magnetic amplifier for d c measurements in the picovolt range
%J Cryogenics : low temperature engineering, applied super conductivity, cryoelectronics, cryophysics
%V 10
%N 4
%@ 0011-2275
%C Amsterdam
%I Elsevier
%M RWTH-CONV-011168
%P 333-335
%D 1970
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:A1970G901400015
%R 10.1016/0011-2275(70)90067-6
%U https://publications.rwth-aachen.de/record/129994