But there was a time... https://pubs.aip.org/aip/jcp/article/56/4/1776/213971/Proton-Enhanced-Nuclear-Induction-Spectroscopy-A https://pubs.aip.org/aip/jcp/art

But there was a time... https://pubs.aip.org/aip/jcp/article/56/4/1776/213971/Proton-Enhanced-Nuclear-Induction-Spectroscopy-A https://pubs.aip.org/aip/jcp/article/56/4/1776/213971/Proton...