政府造林工程中内源式的参与和质量控制——以甘肃A县和B区的退耕还林为例
정부조림공정중내원식적삼여화질량공제——이감숙A현화B구적퇴경환림위례
Endogenous Participation and Quality Control in Government Afforestation Projects:A Case Study on Convert Cultivated Land into Forests Projects in A County and B District of Gansu