There is no sure-fire way to find journals by subject but you can try these two methods:
1. On their Research Guides, many of the Subject Librarians list some of the top journals in their fields. Your best bet is to ask your subject librarian.
2. Use Library Search to find items available at Emory. Choose "Subjects" in the dropdown menu, and type your subject into the search box. Click the Search button. On the results page, use the Resource Type drop-down in the left navigation menu, then click the link for Journal, Newspaper or Serial.