Here's a couple of explanatory web site URLS that should get you answers:http://libwww.library.phila.gov/faq/guides/genealogy/newspap...http://libwww.freelibrary.org/faq/eref.cfm
At one time you could email them the info (names & DoD) and they would do a look-up(s). If they came up with a hit, they'd email you the results and then you sent them the money (a few dollars). You were limited to two people look-ups at a time. Now it costs more but still worth it. The cost of transportation & parking being what it is makes this a 'bargain'.