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Historical foundations of research on statistical association techniques
A modified statistical association procedure for automatic document
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abstracts applied assigned automatic indexing AVG G EK Borko citation index classification clump co-occurrence collection concept context corpus correlation coefficient defined derived described descriptors dictionary discriminant docu document retrieval EK GL EKL experimental factor analysis figure FORTRAN frequency function given hierarchy index terms information retrieval input key words latent class analysis latent class model library computer literature Mach machine Maron matrix means measure mechanized documentation ments method normalized matrix null hypothesis number of documents occur output pairs paper parameters percent PGEC probability problem procedure processing profiles Psychological Abstracts psychology PZD AVG G query references relationships relevant retrieval system sample search requests selected semantic sentence Sorted specific STATIN statistical association techniques structure synonymy syntactic System Development Corporation Table Tag-Terms tape thesaurus tion titles total number vector vocabulary VOTES WORD NOCC word type