Hildebrand, Alan R.; Boynton, W. V. (1989): Location of the Cretaceous/Tertiary boundary impact site. Geological Society of America (GSA), Boulder, CO, United States, In: Dymek, Robert F. (chairperson), Shelton, Kevin L. (chairperson), Geological Society of America, 1989 annual meeting, 21 (6), 371, georefid:1992-062727