STI: From NASA's STI (RECON) project. APJ: From U. Chicago Press, publishers of ApJ to 2007. AJ: Prior to 1998, from AJ index, 1998-2007 from U. Chicago Press. AP: From Academic Publishers, usually references from Icarus. A&A: From Springer, publishers of A&A. A&A via CDS: Prior to 1998, from CDS who indexed A&A. A&AS: From EDP Sciences, publishers of A&AS. AAS: From the American Astronomical Society. ACA: From Acta Astronomica. ADASS: From one of the ADASS editors. ADIL: From NCSA's ADIL project. AGDP: From A.G.Davis Philip AIP: From American Institute of Physics web site. AN: From Astronomische Nachtrichten. ARA&A: From Annual Review's web site. ASP: From Astronomical Society of the Pacific. ATEL: From the Astronomer's Telegram. AUTHOR: Submitted by a user or conference proceeding editor. BALTA: From Baltic Astronomy. BEO: From Bulletin Astronomique de Belgrade. BESN: From BE Star News. BSSAS: Library of the Department of Astronomy, University of Bologna. CARL: From The Colorado Allegience of Research Libraries. CfA: From CfA's John Wolbach Library. COSKA: From Konkoly Observatory. CUP: From Cambridge University Press. DSSN: From Delta Scuti Star Newsletter. ELSEVIER: From Elsevier Science. ESO: From European Southern Observatory Library. GCPD: From Universite de Lausanne. IAJ: From Irish Astronomical Journal. IBVS: From Information Bulletin on Variable Stars. ICARUS: From Icarus through Academic Publishers. IOP: From Institute of Physics. JASS: From Journal of Astronomy and Space Sciences. JBAA: From Journal of the British Astronomical Association. JIMO: From WGN, Journal of the International Meteor Organization JKAS: From Journal of the Korean Astronomical Society. KLUWER: From Kluwer Academic Publishers. KNUDSEN: From Helen Knudsen's Astronomy and Astrophysics Monthly Index. KON: From Konkoly Observatory. LOC: From Library of Congress. LPI: From Lunar and Planetary Science Institute. M&PS: From Meteoritics and Planetary Science. METBASE: From METBASE, meteorite information database and bibliography of meteoritics and planetary science, compiled by Jörn Koblitz, Bremen, Germany. METIC: From Meteoritics (Now M&PS). MPE: From Max-Plank Extraterrestrial Institute. MNRAS: From Blackwell Science, publishers of MNRAS. NED: From NASA's Extragalactic Database. NEWA: From New Astronomy. OSA: From Optical Society of America. OCR: Rendered from Optical Character Recognition. PASP: Prior to 1998, from PASP index, now from U. Chicago Press. PASA: From Publications of the Astronomical Society of Australia. PASJ: From Publications of the Astronomical Society of Japan. PDS: From Planetary Data System. PRINCETON: From Princeton University Astrophysics Library. RMXAA: From Revista Mexicana di Astronomica y Astrofisica RMXAC: From Revista Mexicana di Astronomica y Astrofisica Conference Series. RvMA: From Reviews of Modern Astronomy. S&T: From Sky & Telescope SAO: From Smithsonian Astrophysical Observatory Publication Department. SIMBAD: From SIMBAD. SPIE: From Society for PhotoOptical and Instrumentation Engineers. SPRN: From Springer. STSCI: From Space Telescope Science Institute Library. UMI: From UMI Company. USCI: From University Science Books. USNO: From U.S. Naval Observatory Library. UTAL: From University of Toronto Astronomy Library. WEB: Taken from the Web. WILEY: From Wiley InterScience Publishers.