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      <record key="001" att1="001" value="IHS100481504" att2="IHS100481504">001   IHS100481504</record>
      <field key="037" subkey="x">englisch</field>
      <field key="050" subkey="x">Buch</field>
      <field key="076" subkey="">Formalwissenschaft</field>
      <field key="100" subkey="">blackman, r.b.</field>
      <field key="104" subkey="a">tukey, j.w.</field>
      <field key="331" subkey="">the measurement of power spectra</field>
      <field key="335" subkey="">from the point of view of communications engineering</field>
      <field key="403" subkey="">1. ed.</field>
      <field key="410" subkey="">new york</field>
      <field key="412" subkey="">dover publications</field>
      <field key="425" subkey="">1958</field>
      <field key="433" subkey="">x, 190 pp.</field>
      <field key="451" subkey="">dover books on engineering and engineering physics</field>
      <field key="517" subkey="c">from the table of contents: preface; general discussion: introduction; autocovariance functions and power spectra; the practical</field>
      <field key="sit" subkey="u">ation; continuous records of finite length: fundamentals; two particular window pairs; covariability of estimates - basic</field>
      <field key="res" subkey="u">lt; covariability of estimates - approximate forms; variability - equivalent widths; chi-square - equivalent degrees of</field>
      <field key="fre" subkey="e">dom; direct analog computation - graded data windows; distortion, noise, heterodyne filtering and prewhitening; equally</field>
      <field key="spa" subkey="c">ed records: aliasing; transformation and windows; variability and covariability; prewhitening; rejection filtering and</field>
      <field key="sep" subkey="a">ration; smoothing by groups; pilot estimation; very low frequencies; analysis in practice: practical analysis of an equally</field>
      <field key="spa" subkey="c">ed record; sample computing formulas; planning for measurement: choice of frequency response; duration of data required;</field>
      <field key="amo" subkey="u">nt of digital data-handling required; quality of measurement and handling; examples; appendix: fundamental fourier</field>
      <field key="tec" subkey="h">niques; details and derivations; details for continuous analysis; details for equi-spaced analysis; details for planning;</field>
      <field key="544" subkey="">1904-A</field>
    </SEQUENTIAL>
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