An introduction to plain trigonometry, with its application to heights and distances. ... By Richard Cockrel, ...
Cockrel, Richard.
Darlington : printed and sold by M. Heavisides, for the author; by Messrs. Law and Son; and Mr. D. Taylor, London; Mr. Pine, Bristol; Messrs. Wilson and Spence, York; and Mr. Nicholson, Barnardcastle,
1792.
ESTC