ISBN 9780199532544 books & textbook
Sextants at Greenwich: A Catalogue of the Mariner's Quadrants, Mariner's Astrolabes, Cross-staffs, Backstaffs, Octants, Sextants, Quintants, ... in the National Maritime Museum, Greenwich.
Mörzer Bruyns, W.F.J. Dunn, Richard
Oxford University Press /2009-08-31 Hardcover / 336 Pages
isbn-10: 0199532540 / isbn-13: 9780199532544