Il catalogo online dei francobolli italiani Nuove emissioni Italia 2020. The main catalogue, Table I, lists 410 stars of classes 0, B, and A whose spectra have bright hydrogen lines, while Table II gives six anomalous objects whose spectra have bright lines of hydrogen and helium, but whose absorption spectra include titanium oxide bands. To learn more about Cummins Filtration, visit our website at https://cumminsfiltration.com