Hey, thanks for posting this, primary sources are so important to high quality science writing. As someone that had experience writing both within and outside of academia I can attest to how frustrating it is to not have access to sources.

I’ve an additional “pro tip” for google scholar users:
If you find a paper that you are interested in but the first link doesn’t take you to the full text clicking the All x versions link may help you find a link that does

Click brings you here: