Books (71) E-Books (98) Articles (Online) (9191) OpenAccess-fulltext (13401) more... Thesis (Online) (6) Articles (Print) (18) Bookchapter (Print) (25) Video (DVD/CD) (8) Bookchapter (Online) (399) Audio (DVD/CD) (1) Thesis (1) Video (Online) (4) Audio (Online) (7) less...
english (17198) german (101) more... spanish (1974) french (185) italian (343) dutch (2) portuguese (314) latin (22) swedish (1) finnish (1) less...