- Theorie der Schwerkraft
- Theorie der Zeit
- Theorie von Berechnung
- Theories of All
- Theories of All Things
- Theories of Everything: Ideas in Profile
- Theories of Figures of Celestial Bodies
- Theories of Psychology, Mathematics and Chemistry by William Dale MacLeod
- Theories of Sustainable Development
- Theories of the Universe
- Theories of the World from Antiquity to the Copernican Revolution
- Theories, Sites, Toposes
- Theorizing Southeast Asian Relations
- Theorizing Transition
- Theory and Application of Liapunov's Direct Method
- Theory And Applications In Mathematical Physics: In Honor Of B Tirozzi's 70th Birthday
- The Theory and Applications of Iteration Methods
- Theory and Applications of Ocean Surface Waves
- Theory and Approaches of Unascertained Group Decision-Making
- Theory and Best Practices in Science Communication Training
- Theory and Methods
- Theory and Methods of Photovoltaic Material Characterization
- Theory and Phenomena of Metamaterials
- Theory and Practice in Heritage and Sustainability
- The Theory and Practice of Brewing Illustrated
- Theory and Practice of Computation
- The Theory and Practice of Conformal Geometry
- Theory and Practice of Contrast
- Theory and Practice of Dialogical Community Development
- Theory and Practice of International Mediation
- Theory and Problems for Chemistry Olympiad
- Theory and Reality
- The Theory and Reality of Multiverses and Time Travel
- Theory and Technology of Sheet Rolling
- Theory Of Akashik Creation: Sound Physics & Consciousness
- The Theory of Algebraic Numbers
- The Theory of Almost Everything
- Theory of Approximation
- Theory of Atomic Nuclei, Quasi-particle and Phonons
- Theory of Consciousness
- Theory of Differential Equations in Engineering and Mechanics
- Theory of Discrete Attractors
- The Theory of Ecology
- The Theory of Education in the United States
- Theory of Electromagnetic Wave Propagation
- Theory of everything
- Theory of Electromagnetic Wave Propagation
- Theory of everything
- The Theory of Everything All the Way Up Enhanced Edition
- The Theory of Everything and the Man Who Could Save the Earth
- The Theory of Everything for Everyone
- Theory of Everything With New Discoveries!!
- Theory of Everything...Science and the Bible
- The Theory of Everything
- Theory of Evolution - Simple Guides
- The Theory of Evolution in the Light of Facts
- The Theory of Evolution
- THEORY OF EXISTENCE
- The Theory of Existence. Digital Universe. Ideas that Should Be Known
- The Theory of Functions of Real Variables
- Theory of Functions, Parts I and II
- Theory of Fundamental Processes
- Theory of Games and Statistical Decisions
- Theory of General Economic Equilibrium
- Theory of Gravity
- Theory of Groups and Symmetries
- Theory of Groups of Finite Order
- The Theory of Groups