The elements of navigation; containing the theory and practice. With the necessary tables, ... To which is added, A treatise of marine fortification. ... By J. Robertson, ...

London : printed for F. Wingrave; G.G. and J. Robinson, and T.N. Longman; W. Richardson; and J. Scatcherd, 1796.

2v.,plates : ill.,maps ; 40.

The sixth edition, with additions. Carefully revised and corrected by William Wales. ..

ESTC T147287

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