The Grand Staircase at Kanab Creek in 1879 the Grand Canyon's third dimension : its remarkable first measurement by C.D. Walcott
Lehi F. Hintze Ellis L Yochelson (Ellis Leon) 1928-2006
Provo, Utah Dept. of Geological Sciences, Brigham Young University c2009
Disponible en IGC - Instituto de Geociências (557.92 H666g )(Obténgalo)