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Principle
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Independently Published
The Sterling Principle: Principle Trilogy Book 1
OmniScriptum
Dirichlet's Principle: Principle, Potential Theory, Poisson's Equation, Mathematics
Fermat's principle: Optics, Huygens-Fresnel principle, Reflection (physics)Snell's law, Refraction, Specular reflection, Hamilton's principle
Born Bad Records
Pleasure Principle
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