  We present element-to-element abundance ratios measured from high dispersion
spectra for 150 field subdwarfs and early subgiants with accurate Hipparcos
parallaxes (errors <20%). For 50 stars new spectra were obtained with the UVES
on Kueyen (VLT UT2), the McDonald 2.7m telescope, and SARG at TNG.
Additionally, literature equivalent widths were taken from the works by Nissen
& Schuster, Fulbright, and Prochaska et al. to complement our data. The whole
sample includes both thick disk and halo stars (and a few thin disk stars);
most stars have metallicities in the range -2<[Fe/H]<-0.6. We found our data,
that of Nissen & Schuster, and that of Prochaska to be of comparable quality;
results from Fulbright scatter a bit more, but they are still of very good
quality and are extremely useful due to the large size of his sample. The
results of the present analysis will be used in forthcoming papers to discuss
the chemical properties of the dissipational collapse and accretion components
of our Galaxy.
