Many of our Chemistry journals are available in a variety of formats. While newer issues are exclusively available digitally, older issues are often only available in print (or even on microform). If you need help finding a print copy of a journal issue, please ask a librarian.
What does this citation mean? How could I find it?
Always check the works cited/references of the helpful sources you have found already to see if they lead you to other a little bit older helpful sources. You can also search your best article's title in Google Scholar where you can see what more recent sources have cited your source.