The authors have shown how two extensive stellar spectral libraries of very high quality obtained with telescopes of small size can help us in determining the main properties of the stellar populations of the galaxies (e.g., age; metallicity; IMF; element ratios). New libraries with larger spectral ranges and wider stellar atmospheric parameters coverage are urgently needed. Therefore the small telescopes could play a key role for the studies to be carried out with the new generation of giant telescopes.