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  <titleInfo>
    <title>Revista</title>
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  <name type="corporate">
    <namePart>Universidad Nacional Autónoma de México</namePart>
    <namePart>Instituto de Geología</namePart>
    <role>
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    <place>
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    <publisher>Instituto de Geología</publisher>
    <dateIssued>1977-</dateIssued>
    <dateIssued encoding="marc">1977</dateIssued>
    <issuance>continuing</issuance>
    <frequency>Frecuencia irregular</frequency>
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  <physicalDescription>
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    <extent>v. : il. ; 28 cm</extent>
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  <subject>
    <topic>Geología</topic>
  </subject>
  <subject>
    <topic>Paleontología</topic>
  </subject>
  <subject>
    <geographic>México</geographic>
  </subject>
  <identifier type="issn">0185-0962</identifier>
  <identifier type="stock number">Ciudad Universitaria-Delegación Coyoacan. Apartado Postal 70-296 04510. México D.F. México</identifier>
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