Each country profile contains 10 categories of information-- General information, Environment & geography, Customs & courtesies, Lifestyle, Cultural history, Culture, Society, Social development, Government, and Economy. Each volume also contains the same appendices: Appendix 1 describes the 21 types of governments found around the world, and Appendix 2 describes 10 of the world's major religions. -- Publisher description
Statista is an online statistics portal providing access to data from market and opinion research institutions, as well as from business organizations and government institutions.
The Statistical Abstract of the United States, published since 1878, is the authoritative and comprehensive summary of statistics on the social, political, and economic organization of the United States.
Countries, Peoples and Cultures (Complete Nine Volume Set) by 
American Eras: Primary Sources Vol. 8: Early American Civilizations and Exploration to 1600
Encyclopedia of World Cultures
Encyclopedia of Anthropology