-----nas  22-----zu 4500
001 SKVPK0027112
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005 20180718143959.0
008 210217d19731981||||| | |||  ||   |||||||
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222  0$aDimensions$b(Washington, D.C.)
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650 07$afyzika$xfy$2psh
780 00$tTechnical news bulletin - United States. National Bureau of Standards,19
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