The European Bibliography of Slavic and East European Studies (EBSEES) - 1991-2007

The European Bibliography of Slavic and East European Studies (EBSEES) collects books, journal articles, reviews and dissertations from Eastern Europe (former countries of Eastern Bloc) which were published in Belgium, Germany, Finland, France, Great Britain, the Netherlands, Austria and Switzerland from 1991 to 2007. The segment "Literature" and "Culture" of the European Bibliography of Slavic and East European Studies contains 18.000 bibliographic entries (from the total asset of 85.000). More information can be found here.

Your search for Schwendemann, Heinrich provides 2 hits
1	Die wirtschaftliche Zusammenarbeit zwischen dem Deutschen Reich und der Sowjetunion von 1939 bis 1941: Alternative zu Hitlers Ostprogramm? Schwendemann, Heinrich, Berlin, Akad.-Verl., 1993, 398 p.
2	German-Soviet economic relations at the time of the Hitler-Stalin pact, 1939-1941 Schwendemann, Heinrich, in: Cahiers du Monde russe, 36(1-2), janv.-juin, 1995, p. 161-78

The European Bibliography of Slavic and East European Studies (EBSEES) - 1991-2007

Die wirtschaftliche Zusammenarbeit zwischen dem Deutschen Reich und der Sowjetunion von 1939 bis 1941: Alternative zu Hitlers Ostprogramm?

German-Soviet economic relations at the time of the Hitler-Stalin pact, 1939-1941