@Book{BVMC:684147, author = {Espinosa, J. M.}, title = {[Carta de J. M. Espinosa al proveedor general. San Lorenzo (Chihuahua), 15 de marzo de 1911]}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2014}, year = {2014}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmctx575} }