SEARCH HINT: Most databases use a truncation symbol--sometimes called a wild card--that you can use at the end of your keywords to pick up variant endings of that word. In most databases, this truncation symbol is the asterisk *
Use this at the end of a root word to pick up all the endings of the word, e.g., slave* will pick up slave, slaves, slavery, slaveholder, slaveowner, etc.
There is a print reference set that indexes OLDER scholarly articles in the field of history. Depending on your topic, you may want to take a look here.
Combined Retrospective Index Set to Journals in History, 1838-1974
Z 6205 .C18
This 11-volume set allows the user to search by broad keywords to find articles about history and its related fields in scholarly journals dating as far back as 1838, through 1974. One can also search by author names to get journal citations.
There are several other databases that you might search. I strongly recommend you search first in America: History and Life, but the following are other choices for you to find scholarly articles.
Google Scholar sometimes picks up the odd bit of scholarship.
Click here for a brief tutorial of how best to search in Google Scholar.