Hapgood, Charles H. Earth's shifting crust [microform] : a key to some basic problems of earth science / With the collaboration of James H. Campbell. Foreword by Albert Einstein.

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Hapgood, Charles H.

Earth's shifting crust [microform] : a key to some basic problems of earth science / With the collaboration of James H. Campbell. Foreword by Albert Einstein.

Earth -- Crust.

1958.

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