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noaa.gov
ngdc.noaa.gov
National Geophysical Data Center / World Data Service (NGDC/WDS): NCEI/WDS Global Significant Earthquake Database. NOAA National Centers for Environmental Information (1972). "66 Significant Earthquakes where Country = AFGHANISTAN". NOAA National Centers for Environmental Information. doi:10.7289/V5TD9V7K.
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United States. National Transportation Safety Board (1995). Aircraft Accident Report. U.S. Government. p. 107. Archived from the original on 2023-12-07. Retrieved 2020-10-08.
United States. Central Intelligence Agency (1989). The World Factbook. Central Intelligence Agency. p. 134. Archived from the original on 2023-12-07. Retrieved 2020-09-30.