The image with the lead in the duck is from 1966 William. No steel shot in 1966, other than that being investigated by Olin. Read a little closer.

Relevant to Craig's observation, I understand how academics work. I was at the UMKC-SOM for 7 years. Advancement is dependent of publishing and obtaining grant money (inter-related). The folks paying for studies expect the results they hope for. But today, every article requires the authors to list any financial connections to those paying for the studies. And falsifying data is academic suicide. You'll be eventually caught, and teaching in a Jr. High the rest of your life.

Blood lead testing has been confirmed by erythrocyte protoporphyrin since the 70s, and can be performed in the field with a small (finger prick-like) sample. It has nothing to do with lead isotope analysis.
https://repository.si.edu/bitstream/handle/10088/11605/Kennedy1977.pdf?sequence=1

William: Did you miss that my name is Drew? Could you please use it?

https://sites.google.com/a/damascusknowledge.com/www/home