Woollard, G. P., Mungea Caldera, J., Rose, J. C., & Kozlosky, J. A. (1967). Catalogue of gravimetric stations in Latin America. Geofisica Internacional, 7(3-4), 82–211. https://doi.org/10.22201/igeof.00167169p.1967.7.3-4.1174