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In the literature on nuclear magnetic resonance in small metal particles. three main lines of approach are found which lead lo qualitztvely differenl predictions for the behaviour of Knight shift and, where available, for the linewidlh. In [his paper it is shown how these differences arise as mnsequences of the different sets of starling hypotheses used in each type of approach. Some characteristics of the nuclear spin-lattice relaxation are discussed as well, and mention is given lo experimental considerations.

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