I believe this photo to be that of my Aunt Helen, my grandmother, and my Aunt Jennie.
Aunt Helen (Helen Still Webster) and Aunt Jennie (Jeannette Still) are sisters of my great grandfather Pierson G Still. Their brother Lloyd P Still married my grandmother (seated in the middle), Mary Welsh Still.
Aunt Helen passed in 1995, at the age of 91. Aunt Jennie passed in 1982, at the age of 94. Yesterday, 20 May, was the anniversary of my grandmother's passing. She passed in 1989, at age 79. May their Memory Be Eternal.