"35"^^ . . "32"^^ . . . "The Delta 3000 series was an American expendable launch system which was used to conduct thirty five orbital launches between 1975 and 1989. It was a member of the Delta family of rockets. Several variants existed, which were differentiated by a four digit numerical code.The first stage was the RS-27 powered Extended Long Tank Thor, first flown on the 2000-series."@en . "1989-03-24Z"^^ . . "Delta 3000 series"@en . . "1"^^ . . "Retired" . "1975-12-13Z"^^ .