DK 91--Geographie; Entwurf einer Revision.
Subtitle: U. D. C. 91--Geography; Proposal for a revision of the group U. D. C. 91 Geography.
Contributors: Meynen, Emil, 1902- ed.
Published: 1956
Place of publication: [n.p
Language: ger
Number of pages: 90
Subjects: Classification -- Books -- Geography