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View A treatise on elementary trigonometry. [With] Key, by H. Carr By John Bascombe Lock ,Henry Carr ![Cover of A treatise on elementary trigonometry. [With] Key, by H. Carr by john bascombe lock ,henry carr](https://covers.openlibrary.org/b/id/5998404-M.jpg)
A treatise on elementary trigonometry. [With] Key, by H. Carr
By John Bascombe Lock ,Henry Carr
View An Elementary Treatise on Plane Trigonometry By Ernest William Hobson ,C.M. (Charles Minshall) Jessop 
An Elementary Treatise on Plane Trigonometry
By Ernest William Hobson ,C.M. (Charles Minshall) Jessop