Harald Ridderberg (Swedish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Harald Ridderberg" in Swedish language version.

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1kb.se

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libris.kb.se

Elgenstierna Gustaf, red (1931). Den introducerade svenska adelns ättartavlor 6 Posse-von Scheven. Stockholm: Norstedt. sid. 321-322. Libris 10076758