Dr. G. Alan Tarr, Prof. Dr. Robert F. Williams, 'The Authors' (1999), pp. 3–4, in Alen Prof. Dr. Andr (Volume Editor), Roger Blanpain (General Editor), Michele Colucci (Associate General Editor), United States, International Encyclopaedia for Constitutional Law (Kluwer Law International, Alphen aan den Rijn)

Dr. G. Alan Tarr, Prof. Dr. Robert F. Williams, 'General Introduction' (1999), pp. 9–20, in Alen Prof. Dr. Andr (Volume Editor), Roger Blanpain (General Editor), Michele Colucci (Associate General Editor), United States, International Encyclopaedia for Constitutional Law (Kluwer Law International, Alphen aan den Rijn)

Dr. G. Alan Tarr, Prof. Dr. Robert F. Williams, 'Selected Bibliography' (1999), pp. 21–24, in Alen Prof. Dr. Andr (Volume Editor), Roger Blanpain (General Editor), Michele Colucci (Associate General Editor), United States, International Encyclopaedia for Constitutional Law (Kluwer Law International, Alphen aan den Rijn)

Dr. G. Alan Tarr, Prof. Dr. Robert F. Williams, 'Part I. Sources of Sub-national Constitutional Law' (1999), pp. 25–52, in Alen Prof. Dr. Andr (Volume Editor), Roger Blanpain (General Editor), Michele Colucci (Associate General Editor), United States, International Encyclopaedia for Constitutional Law (Kluwer Law International, Alphen aan den Rijn)

Dr. G. Alan Tarr, Prof. Dr. Robert F. Williams, 'Part II. Forms of Sub-national Governments' (1999), pp. 53–70, in Alen Prof. Dr. Andr (Volume Editor), Roger Blanpain (General Editor), Michele Colucci (Associate General Editor), United States, International Encyclopaedia for Constitutional Law (Kluwer Law International, Alphen aan den Rijn)

Dr. G. Alan Tarr, Prof. Dr. Robert F. Williams, 'Part III. Citizenship and the Administration of Justice' (1999), pp. 71–80, in Alen Prof. Dr. Andr (Volume Editor), Roger Blanpain (General Editor), Michele Colucci (Associate General Editor), United States, International Encyclopaedia for Constitutional Law (Kluwer Law International, Alphen aan den Rijn)

Dr. G. Alan Tarr, Prof. Dr. Robert F. Williams, 'Part IV. Local Government and Sub-national Constitutions' (1999), pp. 81–84, in Alen Prof. Dr. Andr (Volume Editor), Roger Blanpain (General Editor), Michele Colucci (Associate General Editor), United States, International Encyclopaedia for Constitutional Law (Kluwer Law International, Alphen aan den Rijn)

Dr. G. Alan Tarr, Prof. Dr. Robert F. Williams, 'Part V. Representative Texts of Sub-national Constitutions' (1999), pp. 85–230, in Alen Prof. Dr. Andr (Volume Editor), Roger Blanpain (General Editor), Michele Colucci (Associate General Editor), United States, International Encyclopaedia for Constitutional Law (Kluwer Law International, Alphen aan den Rijn)

Dr. G. Alan Tarr, Prof. Dr. Robert F. Williams, 'Index' (1999), pp. 231–232, in Alen Prof. Dr. Andr (Volume Editor), Roger Blanpain (General Editor), Michele Colucci (Associate General Editor), United States, International Encyclopaedia for Constitutional Law (Kluwer Law International, Alphen aan den Rijn)