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  <titleInfo>
    <nonSort>The </nonSort>
    <title>threshold of space</title>
    <subTitle>the proceedings of the Conference on Chemical Aeronomy, Cambridge Mass., 25-28 June 1956</subTitle>
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  <name type="conference">
    <namePart>Conference on Chemical Aeronomy (1956 : Cambridge, Mass.)</namePart>
    <role>
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  <name type="personal">
    <namePart>Zelikoff, M.</namePart>
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    <publisher>Published by the Symposium Division, Pergamon Press</publisher>
    <dateIssued>c1957</dateIssued>
    <dateIssued encoding="marc">1957</dateIssued>
    <issuance>monographic</issuance>
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  <physicalDescription>
    <form authority="marcform">print</form>
    <extent>xi, 342 p. : ill. ; 26 cm.</extent>
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  <note type="statement of responsibility">edited by M. Zelikoff.</note>
  <note>Sponsored by Geophysics Research Directorate of the Air Force Cambridge Research Centre, Air Research and Development Command coordinated by Wentworth Institute.</note>
  <note>Includes index.</note>
  <subject>
    <topic>Atmosphere, Upper</topic>
    <topic>Congresses</topic>
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  <subject>
    <topic>Atmosphere</topic>
    <topic>Congresses</topic>
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  <classification authority="ddc" edition="23">551.514 THR 1957</classification>
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