The Bibliographic Database of German Publication on Russia, the Soviet Union and its Successor States (RussGus)

The Bibliographic Database of German Publication on Russia, the Soviet Union and its Successor States (RussGus) contains about 170.000 records from 1974 to 2003 and collects publications of different document types: books, dissertations and other university publications, articles from journals and newspapers including reviews, maps etc. The lists of personal and geographical subjects are located here and here.

Your search for Aderkas, Claus von provides 3 hits
1	Das Zeugnis der baltischen Märtyrer in den Jahren 1918/1919 Aderkas, Claus von, in: Kirche im Osten, 39, 1996, S. 13-29
2	Lutherische Gemeinden im Baltikum. Eine Reise in die Vergangenheit Aderkas, Claus von, in: Evangelischer Digest, 19, 1977, 3, S. 7-8
3	Zwischen Sorgenlast und Hoffnung Aderkas, Claus v., in: Baltische Briefe, 1976, 7-8, S. 5-6

The Bibliographic Database of German Publication on Russia, the Soviet Union and its Successor States (RussGus)

Das Zeugnis der baltischen Märtyrer in den Jahren 1918/1919

Lutherische Gemeinden im Baltikum. Eine Reise in die Vergangenheit

Zwischen Sorgenlast und Hoffnung