Once you have all the articles in a date range displayed on your screen just select from the top bar, Edit> Find (on this page)
Type in the IP #s and search.

One thing that I have noticed about the layout on my browser at least. Unlike some time ago where it lists all the articles in one continuous list now it seems to devide the lenghty list into multiple pages. You might need to remember to switch through the pages and do the Find (on this page) selection multiple times for each date range.