Cross, P. A. Advanced least squares applied to position-fixing / P. A. Cross . - London : North East London Polytechnic, Department of land survey ing, 1983, repr. 1990. - x, 205 p. : ill. ; 30 cm. - Working papers ; no. 6 . Includes bibliographical references ISBN: 090738261 Subjects--Topical Terms: Surveying Dewey Class. No.: 526.9