GALVÁN-ESCOBEDO, I. G.; RAMÍREZ-ARRIAGA, E.; MARTÍNEZ-HERNÁNDEZ, E.; REYES-SALAS, M.; ANGELES-GARCÍA, S.; KOHASHI-SHIBATA, J. Morphological Descriptions Of Late Oligocene – Early Miocene Spores: San Gregorio Formation, Baja California Sur, Mexico. Acta Microscopica, v. 24, n. 1, p. 41-52, 29 maio 2015.