Proton launches in 1981
March 1981
18 Mar
Gran' #18L
Proton
April 1981
25 Apr
Kosmos 1267
Proton
June 1981
25 Jun
Ekran #21L
Proton
July 1981
30 Jul
Gran' #19L
Proton
October 1981
9 Oct
Gran' #20L
Proton30 Oct
Venera 13
Proton
November 1981
4 Nov
Venera 14
Proton