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John_Bonnycastle.png (263 × 467 pixels, file size: 74 KB, MIME type: image/png)
English: Frontpage of A Treatise on Plane and Spherical Trigonometry (third edition, 1816) by John Bonnycastle (1751-1821)
|Source||Google books: https://books.google.cat/books?id=c1wOAAAAQAAJ|
|Author||John Bonnycastle (1751-1821)|
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