mu cao da tian lun zuo zhi de li lun yu ji shu 牧草大田轮作制的理论与技术
nong ye bu guo ying nong chang guan li ju 农业部国营农场管理局
creator
text
book
zhong yang ren ming zheng fu nong ye bu 中央人民政府农业部
1952
1952
CHI
Agriculture
https://www.biodiversitylibrary.org/bibliography/53178