Agricultural mechanization
Subtitle: mechanical equipment for field drainage and ditching.
Series: United Nations.  [Document]; Agri/Mech/18
Publisher: United Nations, Economic Commission for Europe
Published: 1961
Place of publication: Geneva
Language: eng
Number of pages: 32
Subjects: Drainage.; Excavating machinery.
Notes: "United Nations publication.  Sales no. 61.II.E/Mim.9".