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reference book [reference books]▼(book providing factual information)noun[UK: ˈre.frəns bʊk] [US: ˈre.fə.rəns ˈbʊk]
reference work▼(compendium of information)noun[UK: ˈre.frəns ˈwɜːk] [US: ˈre.fə.rəns ˈwɝːk]
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