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Machovec, G.S.: World Wide Web search engines : Altavista and Yahoo (1996)
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- Online libraries and microcomputers. 14(1996) no.5, S.1-6
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Machovec, G.S.: World Wide Web search engines : Open Text, Harvest, 2ASK (1996)
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- Online libraries and microcomputers. 14(1996) no.6/7, S.1-5