As noted earlier, the best place to search by type is the library database list.
The Main Catalog is surprising good too for finding primary sources by type.
1. Use advanced search.
2. Conduct a search. Limit the publication date.
3. After the results load, use the limiters on the left.
OR
1. Use advanced search.
2. Conduct a search. Limit the publication date.
3. Use add the material type as a search term. Examples: