@Book{31197838X,
author="Sommerfeldt, Gustav",
title="Romfahrt Kaiser Heinrichs VII. (1310 - 1313)",
year="1888",
publisher="Hausbrand's Nachfolger",
address="K{\"o}nigsberg",
note="Gustav Sommerfeldt",
note="K{\"o}nigsberg i. Pr., Univ., Diss., 1888",
language="German"
}