CREATE TABLE table_49497 ("Issued" FLOAT, "Type" CLOB, "Design" CLOB, "Serial format" CLOB, "Serials issued" CLOB)

What serial format was issued in 1972?
SELECT "Serial format" FROM table_49497 WHERE "Issued" = '1972'
SELECT "Serial format" FROM "table_49497" WHERE "Issued" = '1972'