found: nuc85-81493: Omar Rayo, la constante geometria, 1972(hdg. on TxU rept.: Rayo, Omar, 1928- ; usage: Omar Rayo)
found: LC data base, 4-16-86(hdg.: Rayo, Omar, 1928-)
found: Spanish Wikipedia WWW site, June 8, 2010(Ómar Rayo; Ómar Rayo Reyes; b. Jan. 20, 1928, Roldanillo, Valle del Cauca, Colombia; d. June 7, 2010, Palmira, Colombia; painter, engraver, and sculptor)
found: Museo Rayo WWW site, June 8, 2010(Omar Rayo)
found: ColArte WWW site, June 8, 2010(Omar Rayo)
found: Centro Virtual Isaacs WWW site, June 8, 2010(Omar Rayo)