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| Angielski tezaurus | |||
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| CHDB code (ssn); CHDB-code (ssn) | |||
| compatible high-density bipolar code (ssn); compatible HDB code (ssn) | |||
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| CHDB code (ssn); CHDB-code (ssn) | |||
| compatible high-density bipolar code (ssn); compatible HDB-code (ssn) | |||
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compatible : 78 do fraz, 22 tematyki |