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24Published 19611200-19611200Subjects: “…[industria chimica - Unione Sovietica, Logunova Feoktista, Riga Electric Bulb Plant (Urss)]…”
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27Published 1924.“…Postcard to Luise Kautsky, dated Riga, 28-4-1924.…”
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29“…The Kaiser "vor der Abfahrt von Riga an der Dampfer-Haltestelle".…”
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30Published (ca.1923)“…Letter to Luise Kautsky, dated Riga, 6-4-1923, on the back. Wurm: left.…”
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