@Misc{BVMC:1134884, author = {Negrín Fajardo, Olegario}, title = {Educational activities of the Economic Society of Friends of the Country of Madrid during the XVIII Century}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2021}, year = {2021}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmc1134884} }