MARTÍNEZ , J. l. . (1995). Microfossils of the Guadalupe group and the Guaduas formation (campaniano-maastrichtlano) in the Tausa section, Cundinamarca, Colombia. CT&F - Ciencia, Tecnología Y Futuro, 1(1), 65–81. https://doi.org/10.29047/01225383.608