Referencias
Martínez-Gomez, H. & Jaramillo, J.M. (2017). Magnetic and Radiometric
Signatures in Soils above Hydrocarbon Accumulations, Toqui-Toqui and
Mana Fields, Tolima, Colombia. Search and Discovery Article #42046,
Datapages. http://www.searchanddiscovery.com/pdfz/documents/2017/
martinez-gomez/ndx_martinez-gomez.pdf.html