U DCL/1-102 Deposited 1970

U DCL/103-183 Deposited May 1973

U DCL/184-259 Deposited February 1975

U DCL/260-449 Deposited February 1975

U DCL/450-606 Deposited May 1980

U DCL/607-654 Deposited December 1988

U DCL/655-834 Deposited October 1993

U DCL/835-968 Deposited 14 December 1995

U DCL/969-1047 Deposited 20 July 2000