The stratigraphy of the Upper Cretaceous and Tertiary in the Southern Middle Magdalena Valley Jaime De Porta 5-50 PDF (Español (España))
Preliminary note on the Vertebrate Fauna found in Curití (Department of Santander, Colombia) Jaime De Porta 111-115 PDF (Español (España))
A contribution to the Knowledge of the Devonian Faunas of Colombia P. A. Morales 51-110 PDF (Español (España))
