权威例句
Gumbotil and Interglacial ClaysGumbotil, Gley, and Accretion-GleyThe Origin of GumbotilOn the origin of gumbotil.GUMBOTIL, A NEW TERM IN PLEISTOCENE GEOLOGY.Clay Mineralogy of a GumbotilGumbotil, accretion-gley, and the weathering profileAccretion-gley and the gumbotil dilemma.MODIFICATION OF A GUMBOTIL SOIL BY LIME AND PORTLAND CEMENT ADMIXTURESSome Colloidal Properties of Pleistocene Clays and Their Bearing on the Chemical Theory of the Formation of Gumbotil