退耕还林与山区经济发展--江油市敬元乡农村经济现状调查及农业产业结构调整的构想
퇴경환림여산구경제발전--강유시경원향농촌경제현상조사급농업산업결구조정적구상
Reusing sloping fields for plantation and economic development in mountainous areas