| LFK | Collection of Herder Institute in Riga | 1825 | Manuskripts | 1825-Rigas-Herdera-instituts-01-133 | de, la | | Jā | Nē | |
| LFK | Collection of Herder Institute in Riga | 1825 | Manuskripts | 1825-Rigas-Herdera-instituts-01-229 | de, la | | Jā | Nē | |
| LFK | Collection of Herder Institute in Riga | 1825 | Manuskripts | 1825-Rigas-Herdera-instituts-01-230 | de, la | | Jā | Nē | |
| LFK | Collection of Herder Institute in Riga | 1825 | Manuskripts | 1825-Rigas-Herdera-instituts-02-012 | de, la | | Jā | Nē | |
| LFK | Collection of Herder Institute in Riga | 1825 | Manuskripts | 1825-Rigas-Herdera-instituts-02-058 | de, la | | Jā | Nē | |
| LFK | Collection of Herder Institute in Riga | 1825 | Manuskripts | 1825-Rigas-Herdera-instituts-03-072 | de, la | | Jā | Nē | |
| LFK | Collection of Kārlis Plēģeris | 555 | Manuskripts | 0555-Plegera-vakums-01-0091 | lv, la | | Jā | Nē | |
| LFK | Collection of L. Latkovskis | 624 | Manuskripts | 0624-Leonards-Latkovskis-01-0091 | lv, la | | Nē | Nē | |
| LFK | Collection of L. Latkovskis | 624 | Manuskripts | 0624-Leonards-Latkovskis-01-0097 | lv, la | | Nē | Nē | |
| LFK | Collection of Rūjiena State Secondary School | 1026 | Manuskripts | 1026-Rujienas-vidusskola-01-0021 | lv, la | | Nē | Nē | |
| LFK | Various transcripts and excerpts from folklore and ethnographical papers | 1400 | Manuskripts | 1400-Etnografisku-rakstu-noraksti-02-0038 | lv, la | | Nē | Nē | |
| LFK | Various transcripts and excerpts from folklore and ethnographical papers | 1400 | Manuskripts | 1400-Etnografisku-rakstu-noraksti-04-0004 | lv, de, la | | Nē | Nē | |
| LFK | Various transcripts and excerpts from folklore and ethnographical papers | 1400 | Manuskripts | 1400-Etnografisku-rakstu-noraksti-04-0005 | lv, de, la | | Nē | Nē | |
| LFK | Various transcripts and excerpts from folklore and ethnographical papers | 1400 | Manuskripts | 1400-Etnografisku-rakstu-noraksti-05-0059 | lv, de, la | | Nē | Nē | |
| LFK | Various transcripts and excerpts from folklore and ethnographical papers | 1400 | Manuskripts | 1400-Etnografisku-rakstu-noraksti-05-0060 | lv, de, la | | Nē | Nē | |
| LFK | Various transcripts and excerpts from folklore and ethnographical papers | 1400 | Manuskripts | 1400-Etnografisku-rakstu-noraksti-05-0062 | lv, de, la | | Nē | Nē | |
| LFK | Various transcripts and excerpts from folklore and ethnographical papers | 1400 | Manuskripts | 1400-Etnografisku-rakstu-noraksti-05-0065 | lv, de, la | | Nē | Nē | |
| LFK | Various transcripts and excerpts from folklore and ethnographical papers | 1400 | Manuskripts | 1400-Etnografisku-rakstu-noraksti-05-0066 | lv, de, la | | Nē | Nē | |
| LFK | Various transcripts and excerpts from folklore and ethnographical papers | 1400 | Manuskripts | 1400-Etnografisku-rakstu-noraksti-07-0036 | lv, de, ru, la, lt | | Nē | Nē | |
| LFK | Various transcripts and excerpts from folklore and ethnographical papers | 1400 | Manuskripts | 1400-Etnografisku-rakstu-noraksti-07-0037 | lv, de, ru, la, lt, ee | | Nē | Nē | |