CREATE TABLE table_62058 ("Outcome" TEXT, "Date" FLOAT, "Championship" TEXT, "Surface" TEXT, "Opponent in the final" TEXT, "Score in the final" TEXT)

What is Surface, when Date is less than 1979, and when Opponent in the Final is 'Bill Scanlon'?
SELECT "Surface" FROM table_62058 WHERE "Date" < '1979' AND "Opponent in the final" = 'bill scanlon'
SELECT "Surface" FROM "table_62058" WHERE "Date" < '1979' AND "Opponent in the final" = 'bill scanlon'