Agricultural mechanization
Subtitle: mechanical equipment for field drainage and ditching
By: prepared by C. Culpin.
Contributors: Culpin, Claude.
Edition: [Rev. ed.]
Series: United Nations. [Document] -- Agri/Mech/18/Rev.1.
Publisher: Commission
Published: 1971
Place of publication: New York
Language: eng
Number of pages: 59
Subjects: Excavating machinery; Drainage
Notes: Cover title.

"United Nations publication. Sales no.E.71.II.E/M1M.9."