@inbook{Cohn+1918+9+16,
url = {https://doi.org/10.1515/9783111660158-002},
title = {Die Einleitung},
booktitle = {Der Almanach perpetum des Abraham Zacuto},
booktitle = {Ein Beitrag zu Geschichte der Astronomie im Mittelalter},
author = {Bernhard Cohn},
publisher = {De Gruyter},
address = {Berlin, Boston},
pages = {9--16},
doi = {doi:10.1515/9783111660158-002},
isbn = {9783111660158},
year = {1918},
lastchecked = {2026-05-12}
}