Child language. Aphasia and phonological universals.
- The Hague, Paris, Mouton, 1968.
- 104 p. 23 cm.
- Janua linguarum. Series minor, nr. 72 .
- Janua linguarum. Series minor ; 72. .
Translation of Kindersprache, Aphasie und allgemeine Lautgesetze.