A scholarly publication on the history of Quakerism since 1906. Find full text access to date via Project Muse or up until the last 3 years via Jstor. Paper copies are available in the Quaker Collection. An excellent resource!
Historic Quaker journals are indexed here: The Friend (1827-1906), Friends Intelligencer (1853-1910) and Friends Review (1847-1894) - be sure to limit your search to these publication titles.
The Journal of the Friends' Historical Society
Pennsylvania magazine of history and biography
Quaker studies
Quaker studies
The journal of the Quaker Studies Research Association and The Centre for Quaker Studies, University of Sunderland.