The end of the cretaceous: sharp boundary or gradual transition? (Q80908933)
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(P31) (Q13442814)
(P304) 1183-1186
(P407) (Q1860)
(P433) 4641
(P478) 223
(P577) Thursday, March 1, 1984
(P1433) (Q192864)
(P1476) "The end of the cretaceous: sharp boundary or gradual transition?" (language: en)
(P2093) Alvarez W
Alvarez LW
Asaro F
Michel HV
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