TY  - SER
AU  - Olóriz,Federico
AU  - Villaseñor,Ana Bertha
AU  - González-Arreola,Celestina
TI  - Re-evaluation of Procraspedites Spath, 1930 (Ammonitina) from the Upper Kimmeridgian of Mexico
SN  - 00379409
N1  - bibliogr. p. 253-254
ER  -