Information bulletin / International Astronomical Union.

no.1-20 1959-68; no.2-25 1959-1970; no.21-30 1968-73; no.26-40 1971-1978; no.31-40 1974-78; no.41-46 1979; no.47 1982; no.48 1982; no.41-50 1979-1983; no.49 1983; no.50 1983; no.51-58 1984-87; no.51-60 1984-1988; no.59-66 1988-91; no.68 1992; no.61-70 1989-1993; no.71 1993; no.71-78 1993-1996; no.79-84 1997-1999; no.87-91 2000-2002; no.92-95 2002-2005; no.96-100 2005-2007; no.101-102 2008; no.103 2009; no.104 2009; no.102(2008)+dup