河北省基层农技推广体系现状问题及发展对策河北省基層農技推廣體繫現狀問題及髮展對策 하북성기층농기추엄체계현상문제급발전대책 Current Situation of Agricultural Technique Extension System at Basic Level in Hebei Province and Measures for Its Development
万方数据
农业科技管理農業科技管理농업과기관리 MANAGEMENT OF AGRICULTURAL SCIENCE AND TECHNOLOGY 2005年2期35-36,共2页
