There are several journals that discuss administrative theories and models that address challenges related to conflict resolution, social harmony, and national integration. These journals provide valuable insights into the field of public administration and offer theoretical frameworks and practical solutions for addressing these complex challenges. Below are some notable journals in this field:

1. Journal of Public Administration Research and Theory (JPART):
- JPART is a leading journal that publishes research on public administration, including administrative theories and models.
- It covers a wide range of topics, including conflict resolution, social harmony, and national integration.
- The journal focuses on empirical and theoretical studies that contribute to the understanding of public administration and its role in addressing societal challenges.

2. Public Administration Review (PAR):
- PAR is one of the oldest and most prestigious journals in the field of public administration.
- It publishes articles that explore various aspects of public administration, including theories and models related to conflict resolution, social harmony, and national integration.
- The journal aims to advance knowledge and practice in public administration by providing a platform for rigorous research and innovative ideas.

3. Administration & Society:
- Administration & Society is an interdisciplinary journal that publishes research on public administration, organizational behavior, and social policy.
- It covers a wide range of topics, including administrative theories and models that address challenges related to conflict resolution, social harmony, and national integration.
- The journal encourages research that combines theoretical insights with practical implications for public administrators.

4. Public Administration and Development:
- Public Administration and Development is a journal that focuses on the relationship between public administration and development.
- It publishes research that examines the role of administrative theories and models in promoting conflict resolution, social harmony, and national integration in the context of developing countries.
- The journal aims to contribute to the understanding of how public administration can support sustainable development and social progress.

In conclusion, these journals provide a wealth of knowledge on administrative theories and models that address challenges related to conflict resolution, social harmony, and national integration. They offer valuable insights for policymakers, practitioners, and researchers in the field of public administration.