Bibliographical sources mentioned in these texts:
Capitolinus, Iulius 80.28; : Life of Clodius Albinus 80.12
Cranzius, Albertus 80.1, 80.42
Deventer, Jacob van 80.39
Emmius, Ubbo Gretensis 80.25
Guicciardinus, Ludovicus 80.42
Hanibald 80.23
Kempius, Cornelius 80.6, 80.25; Book on Friesland 80.29
Olivarius, Petrus: Commentaries on Pomponius Mela 80.8, 80.41
Plinius 80.13, 80.28, 80.34; : Third chapter of the fifth book of his Natural History 80.21
Ptolemæus 80.11, 80.15, 80.18, 80.27, 80.29, 80.38
Saxo Grammaticus 80.15, 80.29
Strabo 80.22, 80.29
Suffridus Petrus Frisius : About the Frisians 80.25
Tacitus 80.11, 80.12, 80.18, 80.19, 80.27, 80.28, 80.29, 80.31