庆阳地区农机化志
By: Qingyang Diqu nong ji hua zhi bian ji zu
Edition: Di 1 ban.
Publisher: Qingyang Diqu nong ji hua zhi bian ji zu
Published: 1991
Place of publication: Xifeng
Language: chi
Number of pages: 558
Subjects: Agricultural machinery; History
Other titles: Qingyang Diqu nong ji hua zhi