That's really interesting, thank you - do you know how this was done, like in a practical sense?
Actually I got the timing wrong, it was the 50ies, but here you go:
https://pmc.ncbi.nlm.nih.gov/articles/PMC1363505/
Actually I got the timing wrong, it was the 50ies, but here you go:
https://pmc.ncbi.nlm.nih.gov/articles/PMC1363505/