1991 BA.

1991 BB

1991 BN =

1991 BV Photoelectric Observations of CG Cyg

1991 BVR Photometry of CG Cygni

1991 BVR_cI_c Light Curves and Period Study for the very short period, active W UMa System, V743 Sagittarii

1991 BY2 = 1994 OA

1991 Comet Handbook

1991 CS

1991 DA: an asteroid in a bizarre orbit

1991 DB

1991 December 13 meeting of the Royal Astronomical Society

1991 DG

1991 Eclipse Timings for 44 i Bootis and Up-To-Date Ephemeris

1991 EE

1991 FA

1991 FB

1991 February 8 meeting of the Royal Astronomical Society

1991 GO

1991 GO.