found on http://lacarrera2007.blogspot.com/2009/09/rare-la-carrera-panamericana-photos.html via
http://www.thegentlemanracer.com/2013/07/1954-la-carrera-panamericana.html
for program from the 1953 Panamericana, see Portago's site: http://deadlycurves.blogspot.com/2013/01/1953-carerra-panamericana-program.html