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  The California earthquake of April 18, 1906 : report of the State Earthquake Investigation Commission, in two volumes and atlas.
 
    Acknowledgements
    Foreword
    Introduction
    Preface
    Introduction

  expand section The California Earthquake of April 18, 1906  Volume I, Part I
  expand section The California Earthquake of April 18, 1906  Volume I, Part II
  expand section The California Earthquake of April 18, 1906  Volume II

  expand section Appendix  Theory of the Seismograph