Clelia Molinari and two young boys, perhaps her children? Clelia was a sister of Amalia Molinari.
Delia Bonatto (standing on left) & Adelina Bonatto Baso (standing on right). The two children are unknown. Delia & Adelina were half-sisters of Amalia Molinari. This was a picture card mailed to Amalia Molinari Bendezu, on the reverse it reads, “Memento for my dear little sister Amalia & her family in proof of deep affection. Delia Bonatto. Junin, 6/20/1926.” (Translated from Spanish).