http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
edited by U. Esser, H. Hefele, I. Heinrich, W. Hofmann, D. Krahn, V. R. Matas, L. D. Schmadel, G. Zech.
Originally published by Astronomisches Rechen-Institut Heidelberg 1988.
Astronomy and astrophysics abstracts (Astronomisches Rechen-Institut, Heidelberg) ; v. 44