@article {Myers1968,
	title = {Biostratigaphy of the Cardenas Formation (Upper Cretaceous) San Luis Potosi, Mexico},
	journal = {Paleontolog{\'\i}a Mexicana},
	volume = {24},
	year = {1968},
	pages = {1{\textendash}89},
	keywords = {RCBS, TIP},
	url = {http://www.ojs-igl.unam.mx/index.php/Paleontologia/article/view/34},
	author = {Myers, Ralph L}
}
