The Geology of the Neighbourhoods of Flint, Mold, and Ruthin. (Explanation of Quarter-sheet 79 S.E.)268 Seiten10 LesestundenBewachen
The Geology of the Coasts Adjoining Rhyl, Abergele, and Colwyn, (explanation of Quarter-sheet 79 N. W.)94 Seiten4 LesestundenBewachen
