Finding the oldest article on a topic can be difficult. Keep in mind that the database you use needs to:
If you know a key researcher in your field, you can try an author search.
Once you've found your modern and/or seminal article, look for the oldest cited article in that paper.
When using Google Scholar
> Menu in upper left-hand corner
>Search for and select CSULB
>Now in your search results you will have GetIt@CSULB links to access CSULB subscriptions for full-text articles.