Wattenscheid, 1929 46pp. + 18 plates out of text (mainly folding maps and plans), 23cm., Text in German, Doctoral Dissertation (Dissertation zur Erlangung der Würde eines Doktor-Ingenieurs der technischen Hochschule zu Berlin vorgelegt), blind wrappers (bit stained), stamp at verso of title page, text is clean and bright, G113606