Heathcote, John A. How many samples are needed to prove the absence of contamination - an example using arsenic? An Excel spreadsheet containing the full dataset, showing its sub-sampling sub-sampling;dataset;sample;absence;Excel spreadsheet;contamination;arsenic;Geology 2019-02-26
    https://geolsoc.figshare.com/articles/online_resource/How_many_samples_are_needed_to_prove_the_absence_of_contamination_-_an_example_using_arsenic_/7770812
10.6084/m9.figshare.7770812.v1