Knudsen, Christian, Tonny B. Thomsen, Feiko Kalsbeek, Jeppe A. Kristensen, Helenice Vital, and Roger K. McLimans. 2015. “Composition of Ilmenite and Provenance of Zircon in Northern Brazil”. GEUS Bulletin 33 (July). Copenhagen, Denmark:81-84. https://doi.org/10.34194/geusb.v33.4515.