(1949). The principles of the International Phonetic Association: Being a description of the International Phonetic Alphabet and the manner of using it, illustrated by texts in 51 languages (This is a 1971 reprint.). Department of Phonetics, University College, London.

The Principles of the International Phonetic Association: Being a Description of the International Phonetic Alphabet and the Manner of Using It, Illustrated by Texts in 51 Languages. This is a 1971 reprint. Department of Phonetics, University College, London, 1949.