@misc{10498/11950,
year = {1890},
month = {5},
url = {http://hdl.handle.net/10498/11950},
publisher = {Madrid :
   
     Imp. de M. Rojas,},
booktitle = {Tomo 37},
title = {El siglo médico
   Tomo 37 Nº1899 (15/05/1890)},
author = {},
}