jgg     2007 27 (2):  84-88    ISSN: 0412-1961  CN: 21-1139/TG COMPARISION AMONG SEVERAL SEQUENTIAL ADJUSTMENT METHODS Zeng Anmin 1,3) ; and Zhang Liping 2,3) 1)School of Geological & Surveying Engineering, Chang’an University, Xi’an 7100542)Institute of Surveying & Mapping, Information Engineering University of Zhengzhou, Zhengzhou 4500523)Xi’an Information Division of Surveying & Mapping, Xi’an 710054 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null