Barragán-Manzo, R., & Méndez-Franco, A. L. Towards a standard ammonite zonation for the Aptian (Lower Cretaceous) of northern Mexico. Universidad Nacional Autónoma de México.
Chicago Style (17th ed.) CitationBarragán-Manzo, Ricardo, and Ana Laura Méndez-Franco. Towards a Standard Ammonite Zonation for the Aptian (Lower Cretaceous) of Northern Mexico. Universidad Nacional Autónoma de México.
MLA (9th ed.) CitationBarragán-Manzo, Ricardo, and Ana Laura Méndez-Franco. Towards a Standard Ammonite Zonation for the Aptian (Lower Cretaceous) of Northern Mexico. Universidad Nacional Autónoma de México.
Warning: These citations may not always be 100% accurate.