Evaluation on county development level under the background of characteristic towns cultivation：Take Shandong province as an example

LIU Xuan, ZHANG Miao, LI Yan-ni, JIA Ji-ming, WANG Jie

HUBEI AGRICULTURAL SCIENCES . 2020, (16): 211 -216 . DOI: 10.14088/j.cnki.issn0439-8114.2020.16.048