. . . . "USS Unicorn (SS-429)"@en . . . . . . . . . . . . . . "The contract for Unicorn's construction was authorized on 9 July 1942 and her keel was scheduled to be laid down by the Cramp Shipbuilding Company of Philadelphia, Pennsylvania, but she was cancelled on 29 July 1944 before construction could begin."@en . "--07-29"^^ . . . . "The contract for Unicorn's construction was authorized on 9 July 1942 and her keel was scheduled to be laid down by the Cramp Shipbuilding Company of Philadelphia, Pennsylvania, but she was cancelled on 29 July 1944 before construction could begin."@en .