Abundances of four very metal-poor stars of the BPS survey

Francesca Primas, Paolo Molaro, Fiorella Castelli

High resolution CASPEC and EMMI spectra (R$\approx$10${}^4$) of the faint metal- deficient candidates CS 22891--209, CS 22897--8, CS 22948--66 and CS 22968--14 taken from the survey…