Hog, E Astronomical and astrophysical objectives of sub- milliarcsecond optical astrometry E. Hog - Dordrecht Kluwer Academic 1995 - [various pagings.] ISBN: 0-7923-3443-4 Subjects--Topical Terms: AstrometryOptical Astrometry Universal Decimal Class. No.: 082.2:52 / IAU-S166