Thanks for pointing me to this very nice article (easy to understand and stylishly written)!Look up "the Oxford comma".
Here's one link you might want to start with:
What Is An Oxford Comma And When Do You Use It? | Thesaurus.com
Commas can separate items in a list—for most of us this is a grade-school lesson. However, there’s one comma use that tends to complicate the issue even beyond our recess and lunch box years: the Oxford comma. What is the Oxford comma? In a list of three or more items, the last comma is called […]www.thesaurus.com
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