1 matching record(s)
PER International Astronomical Union / Union Astronomique Internationale
Information Bulletin
No. 6, March 1966, to no. 34-35, September-December 1974 (missing no. 9, 1966/67); also no. 39, January 1978 and no. 40, June 1978 {?}.
[1968-39]=no.19
1966-1978