Yazar
peking nung yeh ching chi yen chiu so
1 cilt bulundu.
Cilt sonuçları
Wo kuo nung yeh ching chi kʻo hsüeh chan hsien shang liang tʻiao tao lu ti tou cheng
Chung-kuo nung yeh kʻo hsüeh yüan, Peking. Nung yeh ching chi yen chiu so · Nung yeh chʻu pan she
347 sayfa · 1959
Agriculture / Economic aspects / Economic aspects of Agriculture