Twysden, John: Miscellanies, or mathematical lucubrations / Problematum quorundam mathematicorum, de triangulis tam rectangulis quam obliquangulis, analytica solutio et constructio : Certain mathematical problems, concerning triangles as well oblique as rectagled, analytically resolved and effected ; Problemata quaedam succincta condendi [...]. Londini : ex officina Leybourniana 1659
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