Using the Advanced Search can make your results more efficient and specific. Select Boolean operators, such as AND to search for multiple keywords. You can also select where the keywords appear, such as title, subject heading, publication information, or anywhere in a catalog record. For example, you can combine a keyword on a particular subject (e.g., chemistry) with "Pyongyang" as Publication Information. This will search for specifically North Korean materials.

You can refine your search by adding limits, including year published/created, material type, place of publication, and language of the material.

• Place of Publication: This filters your search results to items published in a particular place. Publication place options are presented in a drop-down menu of country names. For North Korean materials, it is important to select “Korea (North).”
• Type of material: This option limits your search results to one or more material types. For instance, periodicals can be filtered by selecting “Periodical or Newspaper.”

You can find LC Subjects in any catalog record. Clicking on a subject heading will take you to more resources about a particular subject. For example, the catalog record shown in the image below has “Kim Il-sŏng chŏnjip—Indexes” as its subject heading. Another tip for searching is to open a catalog record and click on “Browse by shelf order.” This will show you other items next to it on the shelf—many of which will be about the same or similar topics. This section is highlighted in the image below.

To browse catalog records of all serials from North Korea, use Advanced Search and enter “Pyongyang” as Publication Info and “Periodical or Newspaper” as Type of Material, as shown in the image below. These are all North Korean serials at the Library of Congress.