BLDGBLOG: Ghosts of Planets Past: An Interview with Ron Blakey
▻http://bldgblog.blogspot.com.es/2013/09/ghosts-of-planets-past-interview-with.html
Interview de Dr. Ron Blakey, Professor Emeritus NAU Geology (son site perso est par ici ▻http://www2.nau.edu/rcb7)