PERSI - PERiodical Source Index
Kimberly Powell recently wrote an article titled, Top 10 Overlooked Genealogy Records. There were some interesting records included, but the last one jumped out at me since I've seen it somewhere before. It is called PERSI - The PERiodical Source Index.
For a good explanation of what the PERSI is, please visit Kimberly Powell's description.
The place I have seen this reference is at HeritageQuest Online. I have written about this website before and how you can access it for free with your library card.
It seems I need to start using HeritageQuest Online for more than just the Census Records. The PERSI seems to be a valuable resource as well.
It does look like you do have to pay to have the information sent to you though. I just tried to access a few different articles on some Bickels in my family and it sent me to this link for ordering copies. It could be a bit pricey.