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Groningen—Natuurkundig Laboratorium der Rijks-Universiteit

Published online by Cambridge University Press:  03 June 2021

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Abstract

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Copyright
Copyright © The American Journal of Science

References

1 All Cro- numbers became GrN- numbers after correction for Suess effect, as indiclted in reference 112, Table 1; note a has therefore been omitted from all corrected dates in Column 4.

2 Sample numbers were not published in reference 96; italicized numbers in this column give the page number in the original Nature article, followed by number of sample or paragraph as printed there.