Bielefeld:
Friedrich Schwagmeyer: Der Lautstand der ravensbergischen Mundart von Hiddenhausen. Trenkel, Berlin 1908, page 17
Stader Geest:
Marcus Buck: attested by oral sources on the Stade Geest
Südwest-Ostfalen:
Albert Hansen: Holzland-ostfälisches Wörterbuch. Ummendorf 1964, page 171
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Plattmakers is a Low German dictionary that also provides translations in several languages. Get more infos.