Longitude made easy, from the moon's altitude only. By William Garrard. Author of the Trigonometrical Tables.

Chelsea : printed for the author, by D. Jaques, No. 7, Neat Houses, M,DCC,XCI. [1791]

[34]p. ; 80.

ESTC T41193

Electronic reproduction. Farmington Hills, Mich. : Thomson Gale, 2003. (Eighteenth century collections online). Available via the World Wide Web. Access limited by licensing agreements.