Tetley, L. 1941- Electronic aids to navigation : position fixing / L. Tetley, D. Calcutt.. - London : E. Arnold, 1991. - ix, 386 p. : ill. ; 25 cm. Includes index. ISBN: 0340543809 LCCN: 92200943 Subjects--Topical Terms: Electronics in navigation. Dewey Class. No.: 623.89