Online ISSN: 2455-7188 IMPACT FACTOR: 0.7261 Thomson Reuters Researcher ID: J-5005-2016 CERTIFICATE OF PUBLICATION This is to Certify that Mr./Mrs./Ms./Dr. Dr. S. John Sundar has published research paper in " INTERNATIONAL JOURNAL OF INNOVATIVE RESEARCH IN MANAGEMENT STUDIES (IJIRMS) peer reviewed and refereed journal, Volume- 8, Issue- 8, August 2026, pp. 29-35." Paper Title:- " DISTRICT SUSTAINABLE DEVELOPMENT INDEX IN TAMIL NADU: A DATA-BASED ASSESSMENT OF INTER-DISTRICT DEVELOPMENT DISPARITIES " Chief Editor