Articulation of Speech Sounds (Marburg: Elwert)

Studier over engelske kasus (out of print)

Chaucers liv og digtning (out of print)

Progress in Language (out of print)

Fonetik (Copenhagen: Gyldendal)

How to Teach a Foreign Language (London: George Allen & Unwin)

Lehrbuch der Phonetik (Leipzig: Teubner)

Phonetische Grundfragen (Leipzig: Teubner)

Growth and Structure of the English Language (Leipzig: Teubner)

A Modern English Grammar: I, II (Heidelberg: Winter)

Sprogets logik (Copenhagen: Gyldendal)

Nutidssprog (Copenhagen: Gyldendal)

Negation in English and Other Languages (Copenhagen: HÖst)

Chapters on English (London: George Allen & Unwin)

Rasmus Rask (Copenhagen: Gyldendal)