Man is not lost: a record of two hundred years of astronomical navigation with The Nautical Almanac, 1767-1967.
Royal Greenwich Observatory.
National Maritime Museum (Great Britain)
London, Published jointly for the National Maritime Museum [and] The Royal Greenwich Observatory [by] H.M.S.O.,
1968.
Includes extracts from The Nautical almanac for the year 1967.
Bibliography: p. 23.
Nautical almanac.