@book{44000,
	author = {Loney, S.L.},
	title = {Plane trigonometry (E-Book)},
	publisher = {Cambridge University Press},
	year = {1893},
	address = {London},
	url = {https://ia802703.us.archive.org/26/items/planetrigonomet00lonegoog/planetrigonomet00lonegoog.pdf}
}