Venezuela history
https://en.m.wikipedia.org/wiki/History_of_Venezuela

Attack on Richard Nixon's motorcade
https://en.m.wikipedia.org/wiki/Attack_on_Richard_Nixon%27s_motorcade

The Day Venezuelans Attacked Nixon - Association for Diplomatic Studies and Training
http://adst.org/2013/05/the-day-venezuelans-attacked-nixon/

Precarious Paths to Freedom: The United States, Venezuela, and the Latin American Cold War
This is online thru Project Muse
https://muse.jhu.edu/book/44918

Marcos Pérez Jiménez (Venezuela)
https://en.m.wikipedia.org/wiki/Marcos_P%C3%A9rez_Jim%C3%A9nez

History of Venezuela (1948–58)
https://en.m.wikipedia.org/wiki/History_of_Venezuela_(1948%E2%80%9358)

Rómulo Betancourt (Venezuela)
https://en.m.wikipedia.org/wiki/R%C3%B3mulo_Betancourt

Map: Venezuela
http://www.nationsonline.org/oneworld/map/venezuela-map.htm

BBC Profile
http://www.bbc.com/news/world-latin-america-19649648
Timeline
http://www.bbc.com/news/world-latin-america-19652436

Country Study (Library of Congress)
http://www.loc.gov/item/92010376/

CIA World Factbook
https://www.cia.gov/library/publications/the-world-factbook/geos/ve.html

US Embassy
http://caracas.usembassy.gov/