AGRIS - 国际农业科技情报系统

On the basic principles of the change in the structure of agricultural techniques [China]

1989

Feng Haifa (Northwest Agricultural Univ. Yangling, Shaanxi (China). Dept. of Agricultural Economy)


书目信息
页码
pp. 5-8
其它主题
Tecnicas biologicas; Technique biologique; Biological techniques; Estructura agricola
语言
中国人
注释
1 ill., Summary (Ch)
类型
Summary

1990-08-15
AGRIS AP