http://www.theindepthgenealogist.com
The In-Depth Genealogist is a good free resource that references the magazine, Going In-depth. When I clicked on the URL, there was a nicely laid-out web page. In the menu bar, I clicked on Digital Magazines. Once there, there was a notice that the magazine could not be downloaded. However, I scrolled down to find a smaller sentence that said download here. For the current issue, I had to download it to my Dropbox account. With past issues, I could download straight to my computer. Do not give up. Keep reading on the site to find the download option.
There are a lot of good articles in the magazine that give ideas for further research.