Celestial Navigation: A Programmed Learning Course: A Step By Step Self-Teaching Course'
by Gerry Smith
ISBN 13: 9780713658125
Format: Paperback (144 pages) Publisher: Adlard Coles Nautical Published: 31 May 2001
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Coastal Navigation: A Programmed Learning Course
ISBN 13: 9780229117093
Format: Paperback (184 pages) Publisher: Adlard Coles Nautical Published: Nov 1983