Atomic Database Listing (Yuri Ralchenko, Plasma Laboratory Weizmann Institute of Science)
BIBL: spectral bibliography database (ИНСТИТУТ СПЕКТРОСКОПИИ РАН, Россия)
Harvard - Smithsonian Center For Astrophysics (Databases of Atomic & Molecular Data for Astronomy)
NIST: Atomic Spectroscopic Database (Version 1.1) (National Institute of Standards and Technology)
HITRAN: High Resolution Transmission Molecular Absorption Database (Atomic and Molecular Physics Division, Harvard-Smithsonian Center for Astrophysics)
Jet Propulsion Laboratory Molecular Spectroscopy Catalog (California Institute of Technology)
VPL Molecular Spectroscopic Database
Spectroscopy of Atmospheric Gases