Ancestry's version of the Periodical Source Index has just been updated. It's a good idea to check back occasionally for the less common names and places you search.
"PERSI is the world’s largest and most widely used subject index to genealogy and local history periodicals written in English and French (Canada). The collection dates from approximately 1800 and contains more than 3 million searchable records from nearly 10,000 different periodicals indexed by staffers at the Allen County Public Library. Since its release in 1986, PERSI has gained wide recognition as an essential tool for high-quality genealogy research.
Periodicals indexed in PERSI include magazines, newsletters, journals, and other publications produced as a series that deal with topics of interest to genealogists and family historians."