CREATE TABLE table_34934 ("Outcome" TEXT, "Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Opponent" TEXT, "Score" TEXT)

Which Surface had a Date of june 13, 1983?
SELECT "Surface" FROM table_34934 WHERE "Date" = 'june 13, 1983'
SELECT "Surface" FROM "table_34934" WHERE "Date" = 'june 13, 1983'