Abundance distribution up to Zn of HE 1523-0901 (upper panels), HD 6268 (central panels) and HD 195636 (lower panels) are compared to other stars with similar [Fe/H] (within 0.5 dex) by Frebel (2010) and to stellar model predictions for CCSNe of initial mass 15 M_⊙ and 25 M_⊙ and metallicity Z = 0.0001, non rotating (left panels) and with initial rotation equal to 300 Km per second (right panels), by Limongi & Chieffi (2018).