Olympia, Archäologisches Tagebuch (Abschrift) - Hirschfeld, Gustav, 1847-1895 (1875)
Digital edition: Transcript of the diary by Unknown. Transcribed by Eva Diana Breitfeld-von Eickstedt and Valtin von Eickstedt, edited by Kristina Zielke, Arnulf Kimmig and Friederike Fless. Redactor: Frank Zimmer.