Geyer, Gerd; Landing, Ed (2017). «The Precambrian–Phanerozoic and Ediacaran–Cambrian boundaries: a historical approach to a dilemma». Geological Society, London, Special Publications. 448 1 ed. pp. 311–349. Bibcode:2017GSLSP.448..311G. doi:10.1144/SP448.10
Geyer, Gerd; Landing, Ed (2017). «The Precambrian–Phanerozoic and Ediacaran–Cambrian boundaries: a historical approach to a dilemma». Geological Society, London, Special Publications. 448 1 ed. pp. 311–349. Bibcode:2017GSLSP.448..311G. doi:10.1144/SP448.10
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