It's not always easy to find exactly what you're looking for when you visit a new website, especially ones that provide an enormous amount of valuable information. For a quick way to get directly to what documents have been archived on microfilm, go to the National Archives website archives.gov
On the Home Page, scroll down to the bottom and select Buy Reproductions and Microfilm
Under Record Reproductions & Microfilm, select MICROFILM
This is where you will have the ability to search and browse NARA's Microfilm Catalog by keyword or publication number.