- 1, side 168) en Beda
Venerabilis (Corpus XLVI9, page 218) Halbertsma,
Herrius (1982). "Summary" (PDF).
Frieslands Oudheid (Thesis) (in
Dutch and English)...
- who
preferred paganism and was an
enemy of
Charles Martel. Halbertsma,
Herrius (1982). "Summary".
Frieslands Oudheid (PDF) (English summary) (in Dutch)...
- 189–206. doi:10.2307/2590857. ISSN 0013-0117. JSTOR 2590857. Halbertsma,
Herrius (1982). "Summary" (PDF).
Frieslands Oudheid (Thesis) (in
Dutch and English)...
- contention.
Bazelmans 2009:321–337, The case of the Frisians. Halbertsma,
Herrius (1982). "Summary" (PDF).
Frieslands Oudheid (Thesis) (in
Dutch and English)...
- Her
husband had 2
illegitimate sons:
Theudoald and Arnold. Halbertsma,
Herrius (1982). "Summary".
Frieslands Oudheid (PDF) (Thesis) (in
Dutch and English)...
-
Martel turns the
Islamic tide (p. 17). ISBN 978-184603-230-1 Halbertsma,
Herrius (1982). "Summary".
Frieslands Oudheid (PDF) (Thesis) (in Dutch). Groningen:...
- to flee. This
uprising was also
suppressed by the Franks. Halbertsma,
Herrius (1982). "Summary" (PDF).
Frieslands Oudheid (Thesis) (in
Dutch and English)...
- in
Duquesne Review, vol. 7, no. 2 (Spring 1962), pp. 71–80. Halbertsma,
Herrius (2000).
Frieslands oudheid: het rijk van de
Friese koningen,
opkomst en...
- in: Sierksma, Kl. (red.),
Liudger 742-809,
Muiderberg 1984 Halbertsma,
Herrius (2000).
Frieslands oudheid: het rijk van de
Friese koningen,
opkomst en...
-
Nederlands Genootschap voor Munt- en Penningkunde, pp. 153–156. Halbertsma,
Herrius (2000),
Frieslands Oudheid: Het Rijk van de
Friese Koningen,
Opkomst en...
