Trigonometrie : or, the doctrine of triangles, divided in two books / by Richard Norwood. - Norwood, Richard,‏ 1590?-1675‏ (printed by B. W. for William Fisher, at the Postern near Tower-Hill, T. Passenger, at the three Bibles on London-Bridge, and R. Smith, at the sign of the Bible in Cornhill, 1685)