- AN UNBROKEN UNITY: A MEMOIR OF GRAND-DUCHESS SERGE OF RUSSIA 1864-1918 by E. M. Almedingen, 1964
- Human Cycle, Ideal Human Unity, etc. by Sri Aurobindo, 1998-06
- Mind and Nature: A Necessary Unity (Advances in Systems Theory, Complexity, and the Human Sciences) by Gregory Bateson, 2002-08
- On the Unity of Christ by Saint Cyril of Alexandria, 1997-03
- Unity and Diversity of Languages
- The Functional Unity of the Singing Voice by Barbara Doscher, 1994-06
- The Unity Way by Marcus Bach, 1982-02
- Documents of Lutheran Unity in America. by Richard C. Wolf, 1979-02-01
- Honor and Shame and the Unity of the Mediterranean (Special Publication of the American Anthropological Association)
- MENTAL HEALTH IN EARLY INTERVENTION: Achieving Unity in Principles And Practice
- That All May Be One: Catholic Reflections on Christian Unity by Ernest R. Falardeau, 1999-11
- In the Beat of a Heart: Life, Energy, and the Unity of Nature by John Whitfield, 2006-09-01
- Unity and Multiplicity: Multilevel Consciousness of Self in Hypnosis, Psychiatric Disorder and Mental Health. by John O. Beahrs, 1982
- Sengokujidai: Autonomy, Division and Unity in Later Medievil Japan by Michael Lorimer, 2008-09-29
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