Gao, Junfeng2017-06-012017-06-01http://hdl.handle.net/2097/35686Originating text in Chinese.Citation: Gao, Junfeng. (1991). Observations on Paragus quadrifasciatus [Het.: syrphidae] in Tonghua County. Chinese Journal of Biological Control, 7(2), 95-95.engCopyright for this item remains with the original copyright holder. Permission was obtained from the copyright holder to translate into English, where applicable, and to host the full-text content.Text