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Rich Brother Rich Sister by Robert Kiyosaki https://www.amazon.com/Rich-Brother-Sister-Different-Happiness/dp/1593155522 'Generalized principle of precession' precession: the slow movement of the axis of a spinning body around another axis due to a torque (such as gravitational influence) acting to change the direction of the first axis. It is seen in the circle slowly traced out by the pole of ..