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  <titleInfo>
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    <title>Naturaleza y sus Recursos : Boletin del Programa sobre el Hombre y la Biosfera</title>
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  <name type="personal">
    <namePart>UNESCO</namePart>
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    <dateIssued encoding="marc" point="start">1974</dateIssued>
    <dateIssued encoding="marc" point="end">1977</dateIssued>
    <issuance>continuing</issuance>
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  <language>
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  <note>-Existencias: 1974 vol. 10, no. 4; 1975 v. 11, no. 1, 4; 1976 v. 12, no. 1, 2, 4; 1977 vol. 13,</note>
  <subject>
    <topic>Hombre</topic>
  </subject>
  <subject>
    <topic>Biosfera</topic>
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