`  :: http://jmfangio.org/gp1956mendoza.htm gives the circuit as General San Martin Circuit in Mendoza; http://www.silhouet.com/motorsport/tracks/sanmarti.html is possibly a modern successor (it seems to be the third or fourth circuit in the general area of Mendoza - http://www.silhouet.com/motorsport/tracks/mendoza.html - or they could all be the same one with different iterations or names, like the Buenos Aires track). It skirts around the name thing; I'd love to see a solid contemporary source for the race title as there's always the possibility most of the established sites are feeding off an old misconception or something; the Motorsport 'report' is pretty obviously swiped straight off the cables, for example... the applicable Autosport, which mentions the race as the ``Mendoza GP`` (possibly just an anglicised/simplified title like ``the Turin GP``) is on ebay so I'll see if that yields anything as I'm pretty damn curious now.  Also several sources list it as a Libre race rather than Formula One; while it's certain it was only contested by F1 cars (unless that clot Uria was still driving a 2-litre...) which was it billed as? Does it make any difference to this article if it was billed as a Libre race but only F1 cars turned up? Or is the Libre thing just from the non-champy Argentine races previously being Libre events until this one?   `