کتاب های Dr. Rer. Nat. Jörn Hansen
![Tribologie: Reibung · Verschleiß · Schmierung](http://cdn.ketabkoo.com/covers/16/1646487-n.jpg)
Tribologie: Reibung · Verschleiß · Schmierung
Dr.-Ing. Oswald Deutscher, Dipl.-Ing. Manfred Laude, Dr.-Ing. Reiner Stelzer (auth.), Professor Dr. rer. nat. Wolfgang Bunk, Dr. rer. nat. Jörn Hansen, Dipl.-Ing. Manfred Geyer (eds.), 1982![Nation Building and Ethnic Integration in Post-Soviet Societies: An Investigation of Latvia and Kazakstan](http://cdn.ketabkoo.com/covers/15/1594851-n.jpg)