Yazar
xi bei nong xue yuan china
10 cilt bulundu.
西北农学院(China). 农业昆虫学教研组 · Ren min jiao yu chu ban she
Sayfa sayısı yok · 1977
Insect pests / Beneficial insect / Entomology
Xi bei nong xue yuan (China) · Xin hua shu dian Beijing fa xing suo fa xing
223 sayfa · 1981
Statistical methods / Agriculture
Xi bei nong xue yuan (China). Nong ji xi · Shanxi ke xue ji shu chu ban she
92 sayfa · 1979
Kategori yok
Xi bei nong xue yuan (China). Gu nong xue yan jiu shi · Shanxi ke xue ji shu chu ban she
186 sayfa · 1984
Agriculturists / Biography
Xi bei nong xue yuan (China). Zhi wu bao hu xi · Shanxi ren min chu ban she
135 sayfa · 1979
Kategori yok
Xi bei nong xue yuan (China). Zhi wu bao hu xi · Shanxi ren min chu ban she
81 sayfa · 1978
Lepidoptera / Butterflies
Xi bei nong xue yuan (China). "Nong ye ji xie ji chu zhi shi" bian xie zu · Shanxi ren min chu ban she
223 sayfa · 1978
Kategori yok
Xi bei nong xue yuan (China). Qian xian lao dong duan lian zhong dui. Nong jing xiao zu · Xin hua shu dian ge ji fa xing suo fa xing
52 sayfa · 1960
Communes (China) / Politics and government / Economic conditions