You can use OneSearch to find books, or you can use OSCAR directly.
For this class, we recommend OSCAR.
You can use the official subject heading France -- History -- Revolution, 1789-1799 and add one or two keywords to it, or you can use "french revolution" as a keyword term and add other keywords to it. Lastly, if you have a super specific query, you can leave out any reference to the French Revolution in general.
In the above example, the official subject heading is used, as well as the keyword guillotine.
In the above example, only the phrase third estate and the root word for revolt and revolution, revol*, is used. These are specific enough that it is not necessary to also use the phrase french revolution.