There are countless databases dedicated to helping researchers find articles on any topic under the sun. Most of them have added features that you won't find in Google Scholar, such as controlled subject headings, filtering, and the ability to capture multiple citations at once. These databases are not free, so they are not accessible to Google's robot searchers. The IU Libraries provides them exclusively to IU staff, students, and faculty. Make the most of them!
The box below lists several subject databases for finding secondary literature in history. Choose the one that matches your topic and period.