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Editor's Preface. Introduction. 1. Societal Multilingualism. 2. Diglossia. 3. Qulaitative Formulae. 4. Statistics. 5. Quantitative Analysis. 6. Language Attitudes. 7. Language Choice. 8. Language Maintenance and Shift. 9. Language Planning and Standardization. 10. Language-Planning Cases. 11. Vernacular Language Edition. Bibliography. Index.
Goldin et al. (Tue,) studied this question.