德沙发育式
1.development;
4.CHARACTERISTICS, ORIGIN AND DEVELOPMENT ERA OF EOLIAN SAND IN SAHELIAN REGION, MALI
6.the capital and largest city of Chad; located in the southwestern on the Shari river.
8.the grain size characteristics of the eolian sands in various coastal sections and sedimentary facies differ in some extent, they are all the special results of the eolian sands in various developing phases and environments.
9.A STUDY ON THE GEOMORPHIC EVOLUTION AND DEVELOPMENT OF THE UPPER REACHES OF YELLOW RIVER IN GUIDE BASIN
