1 Tuloksia löytyi "Tiedosto:The_elements_of_spherical_trigonometry_(IA_elementsofspheri00rich).pdf".

Tiedosto:The elements of spherical trigonometry (IA elementsofspheri00rich).pdf

recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:The_elements_of_spherical_trigonometry_(IA_elementsofspheri00rich).pdf...

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