Hi L. Chavarria, great to know you are Argentinian. Perhaps this will help, from the notes from my elder cousin who lives in Juarez, Juarez province, i believe most of the locations were in the Pcia. Buenos Aires.
My grandparents met in seminary in Azul. They had ministries in the following locations though I may need to correct spellings:
José Quiñones-194 studied at seminary in Azul, Argentina for 3-4 years, along with wife America DiCiancia (2 years.) Di_Ciancia-1
They led ministry in Suarez, La Madrid (perhaps General La Madrid), Las Flores, Mendoza, Campana, Baradero and at the family home in Morón, near Buenos Aires from the 1920s to the 1950s in Argentina.
I did a search on the name to find this link and my grandparents' mentioned in this 2017 historical article here for General La Madrid and the church there!
¡Maravilloso! I will keep looking and update the spelling of the towns as I check with my cousins. Muchisimas gracias!