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Garfield, E.; Sher, I.H.: KeyWords Plus: algorithmic derivative indexing (1993)
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- Journal of the American Society for Information Science. 44(1993) no.5, S.298-299
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Garfield, E.; Sher, I.H.: New factors in the evaluation of scientific literature literature through citation indexing (1963)
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- American documentation. 14(1963) no.3, S.195-201