E-Books (173) Books (129) Articles (Online) (21870) OpenAccess-fulltext (28760) more... Articles (Print) (13) Thesis (Online) (12) Bookchapter (Print) (3) Thesis (4) Audio (DVD/CD) (1) Bookchapter (Online) (1829) Audio (Online) (4) less...
english (43308) german (40) more... latin (3) spanish (18) french (42) portuguese (23) swedish (8) russian (7) polish (1) italian (1) danish (1) dutch (1) less...