What subjects do the call letters cover?
Subclass J General legislative and executive papers.
Subclass JA Political science (General).
Subclass JC Political theory. The state. Theories of the state.
Subclass JF Political institutions and public administration.
Subclass JJ Political institutions and public administration (North America).
Subclass JK Political institutions and public administration (United States).
Subclass JL Political institutions and public administration (Canada, Latin America, etc.).
Subclass JN Political institutions and public administration (Europe).
Subclass JQ Political institutions and public administration (Asia, Africa, Australia, Pacific Area, etc.).
Subclass JS Local government. Municipal government.
Subclass JV Colonies and colonization. Emigration and immigration. International migration.
Subclass JZ International relations.