Ciencia en Guatemala By Edwin Martínez 12345 Jan 3, 1960 Ricardo Bressani May 18, 1973 Mario Dary Rivera Aug 25, 1981 Mario Dary Rivera Feb 17, 1996 Bessie Oliva Apr 18, 1998 Aldo Castañeda Aug 20, 1999 Carlota Monroy Jul 20, 2003 Lourdes Santizo
