Author:

M©dus,J.;Almeida-Lenero,L.

Year:

1982

Title:

Normapolles of the Upper Cretaceous of Piedras Negras, (Coahuila, Mexico).

Foreign title:

Des Normapolles Of Cretace Superieur de Piedras Negras(Coahuila,Mexique).

Reference:

M©dus,J. et al. (1982) Normapolles of the Upper Cretaceous of Piedras Negras, (Coahuila, Mexico). [ Des Normapolles Of Cretace Superieur de Piedras Negras(Coahuila,Mexique). ] Geobios Vol. 15 P. 225- 229

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