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Title: print. Portrait: Balthazar van der Pol 1889-1959. - 1962. - [Go to resource]
Description: print. Portrait: Balthazar van der Pol 1889-1959. - 1962. - etching. HS to L, with text note License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: print
portraitTemporal: 1955-1964 Source: Science Museum Creator: International Telecommunication Union Identifier: 1982-1382/23 Go to resource More Like this...
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