Hellam, Hartvig (TTÜ author)

types of item

  • book
    Üldine elektrotehnikaEsop, Harri; Hellam, Hartvig; Hollmann, Roman; Kanasaar, Eduard; Kroon, Arnold-Konstantin; Plakk, Paul; Puusepp, Eugen; Riikoja, Helmut Erik1949 https://www.ester.ee/record=b1394972*est
    book
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