Heeringa, Wilbert. 2005. Dialect variation in and around Frisia: classification and relationships. Us Wurk: tydskrift foar Frisistyk 3-4. 125-167.
@article{572434,
author = {Heeringa, Wilbert},
journal = {Us Wurk: tydskrift foar Frisistyk},
pages = {125-167},
title = {Dialect variation in and around Frisia: classification and relationships},
volume = {3-4},
year = {2005},
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hhtype = {overview;comparative},
inlg = {English [eng]},
macro_area = {Eurasia},
src = {hh}
}