A system of naval mathematics: or, practical rules of the art of navigation. ... By J. Bettesworth, ...
Bettesworth, John.
London : printed by J. Moore, for the author; and sold by Mr. Le Keux, optician; and the following booksellers, viz. Mr. Wenman, Fleet-Street; Mr. Chappell, Royal - Exchange; Mr. Mottley, Portsmouth; Mr. Gillman, Chatham; and Messrs. Heyden and Son, Plymouth,
1787.
Half-title: 'Bettesworth's Naval mathematics.
ESTC
England London
Also reproduced on microfilm. Woodbridge, CT: Research Publications, Inc., 1986. The Eighteenth Century ; reel 7344, no.02 )