வரலாற்றுப் பாதுகாப்புக்கான தேசிய அறக்கட்டளை (Tamil Wikipedia)

refsWebsite

Global rank Tamil rank

low place

5,529^th place

preservationnation.org

National Trust for Historic Preservation. "What We Do." PreservationNation.org. Retrieved 2014-01-15.
National Trust for Historic Preservation. "Field Offices." PreservationNation.org. Retrieved 2014-01-15.
National Trust for Historic Preservation. "A Brief History of the National Trust." PreservationNation.org. Retrieved 2014-01-15.