What is the serial format for white on blue with a serial issued of ss-00-00 to zz-99-99?
CREATE TABLE "1954_to_1972" (
  "issued" real,
  "type" text,
  "design" text,
  "serial_format" text,
  "serials_issued" text
);
SELECT "serial_format" FROM "1954_to_1972" WHERE "design"='white on blue' AND "serials_issued"='ss-00-00 to zz-99-99';