| 1. | Letter from the Austro-Hungarian Ministry of Railways to the Union Baugesellschaft company about the construction of a rack railway from Lovran to Učka Documentos e Manuscritos | Documents and Manuscripts HMT-204 1909-10-02 |  | |
| 2. | Letter from the Presidential office of the Ministry of Trade Documentos e Manuscritos | Documents and Manuscripts HMT-193 1909-03-30 | | |
| 3. | Letter of the Union-Baugesellschaft construction company to Dr Eder regarding the construction of the Učka railway Documentos e Manuscritos | Documents and Manuscripts HMT-194 1909-10-03 | | |
