පත. සම්ප්‍රවේශය 7 May 2020.↑ Siberian Apocalypse හා සබැඳි අයිඑම්ඩීබී යොමුව↑ Shoemaker, Eugene (1983). "Asteroid and Comet Bombardment of the Earth". Annual Review of Earth and Planetary Sciences. 11 (1): 461–494. Bibcode:1983AREPS..11..461S. doi:10.1146/annurev.ea.11.050183.002333.↑ Shoemaker, Eugene (1983). "Asteroid and Comet Bombardment of the Earth". Annual Review of Earth and Planetary Sciences. 11 (1): 461–494. Bibcode:1983AREPS..11..461S. doi:10.1146/annurev.ea.11.050183.002333.↑ Kresak, L' (1978). "The Tunguska object – A fragment of Comet Encke". Astronomical Institutes of Czechoslovakia. 29 (3): 129. Bibcode:1978BAICz..29..129K.↑ Shoemaker, Eugene (1983). "Asteroid and Comet Bombardment of the Earth". Annual Review of Earth and Planetary Sciences. 11 (1): 461–494. Bibcode:1983AREPS..11..461S. doi:10.1146/annurev.ea.11.050183.002333.↑ Nemtchinov, I.V.; Jacobs, C.; Tagliaferri, E. (1997). "Analysis of Satellite Observations of Large Meteoroid Impacts". Annals of the