Villa Del Refugio/Plateado

Grandmother Guadalupe Davila/Avila, 1/Oct 1902, Villa Del Refugio,ZAC.(married to Angel Villegas) was one of 10 daughters born to Nicolasa Flores, 20 Dec 1885, Plateado and Librado Avila, 7 Nov 1881, Santiago, ZAC who was killed during the Revolution. She came to the USA as a teenage mother and her family remained in Mexico. I can not locate information about these sisters except for her oldest sister Francisca, 16 Apr 1901, Villa Del Refugio. What sources might provide information on the other 8 sisters? Thanks. Evie