Zheng He yu hai shang si chou zhi lu ="Zheng He yu hai shang si chou zhi lu-- ji nian Zheng He xia xi yang liu bai zhou nian" xue shu yan tao hui ( 2005 Aomen da xue), Neil H. Lampman, Karl M. Waage · First published 1993Open the Tome
Stratigraphy of the Inyan Kara group in the Black HillsKarl M. Waage · First published 1959Open the Tome
